Document:

EX-4.4

 Exhibit 4.4 

REGISTRATION RIGHTS AGREEMENT 

THIS REGISTRATION RIGHTS AGREEMENT (this “Agreement”), is made as of [•], 2020, by and among Mavenir plc, a public
limited company organized under the laws of England and Wales with company number 12955698 and its registered office address at 11th Floor 200 Aldersgate Street, London, United Kingdom, EC1A 4HD (the “Company”), and each of the
investors listed on Schedule A hereto, each of which is referred to in this Agreement as an “Investor”. 
 1. Definitions. For
purposes of this Agreement: 
 1.1 “Affiliate” means, with respect to any specified Person, any other Person who, directly
or indirectly, controls, is controlled by, or is under common control with such Person, including, without limitation, any general partner, managing member, officer, director or trustee of such Person, or any venture capital fund or other investment
fund now or hereafter existing that is controlled by one (1) or more general partners, managing members or investment adviser of, or shares the same management company or investment adviser with, such Person. 

1.2 “Damages” means any loss, damage, claim or liability (joint or several) to which a party hereto may become subject under
the Securities Act, the Exchange Act, or other federal or state law, insofar as such loss, damage, claim or liability (or any action in respect thereof) arises out of or is based upon: (i) any untrue statement or alleged untrue statement of a
material fact contained in any registration statement of the Company, including any preliminary prospectus or final prospectus contained therein or any amendments or supplements thereto; (ii) an omission or alleged omission to state therein a
material fact required to be stated therein, or necessary to make the statements therein not misleading; or (iii) any violation or alleged violation by the indemnifying party (or any of its agents or Affiliates) of the Securities Act, the
Exchange Act, any state securities law, or any rule or regulation promulgated under the Securities Act, the Exchange Act, or any state securities law. 

1.3 “Exchange Act” means the Securities Exchange Act of 1934, as amended, and the rules and regulations promulgated
thereunder. 
 1.4 “Excluded Registration” means (i) a registration relating to the sale or grant of securities to
employees or consultants of the Company or a subsidiary pursuant to a stock option, stock purchase, equity incentive or similar plan (including any registration on Form S-8 or similar form) or any registration
filed to cover issuances pursuant to a dividend reinvestment plan; (ii) a registration relating to an SEC Rule 145 transaction or where securities are sold other than for cash (including any registration on Form
S-4 or similar form); (iii) a registration on any form that does not include the same information as would be required to be included in a registration statement covering the sale of the Registrable
Securities, including any offering of securities other than Registrable Securities; or (iv) a registration in which the only ordinary shares of the Company being registered is ordinary shares issuable upon conversion of debt securities that are
also being registered. 

  
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 1.5 “Form S-1” means such form
under the Securities Act as in effect on the date hereof or any successor registration form under the Securities Act subsequently adopted by the SEC. 

1.6 “Form S-3” means such form under the Securities Act as in effect on the date
hereof or any registration form under the Securities Act subsequently adopted by the SEC that permits forward incorporation of substantial information by reference to other documents filed by the Company with the SEC. 

1.7 “Holder” means any holder of Registrable Securities who is a party to this Agreement. 

1.8 “Immediate Family Member” means a child, stepchild, grandchild, parent, stepparent, grandparent, spouse, life partner or
similar statutorily-recognized domestic partner, sibling, mother-in-law, father-in-law, son-in-law, daughter-in-law,
brother-in-law, or sister-in-law, including adoptive relationships of a natural person
referred to herein. 
 1.9 “IPO” means the firm commitment underwritten registered public offering of the Company’s
shares in connection with which the shares first become listed on the NYSE or The NASDAQ Stock Market. 
 1.10 “Person”
means any individual, corporation, partnership, trust, limited liability company, association or other entity. 
 1.11 “Registrable
Securities” means the Class A Ordinary Shares, par value $0.001 per share, of the Company issued to the Holder upon exercise of the Warrant Deed, and any securities issued in respect thereof, or in substitution therefor, in connection
with any share split, dividend or combination, or any reclassification, recapitalization, merger, consolidation or similar transaction. Shares held by or on behalf of a Holder which (a) have been sold to or through a broker, dealer or
underwriter in a distribution to the public or otherwise on or through the facilities of the national securities exchange, national securities association or automated quotation system on which the Company’s capital stock is listed,
(b) are subject to a registration statement with respect to the sale of such shares has become effective under the Securities Act and such shares have been disposed of in accordance with such registration statement, or (c) are eligible for
sale under Rule 144 promulgated under the Securities Act, in each case of clauses (a) through (c) above will not be considered Registrable Securities for purposes of the piggyback provisions of this Agreement. 

1.12 “Restricted Securities” means the securities of the Company required to be notated with the legend set forth in
Section 2.9(b) hereof. 
 1.13 “SEC” means the Securities and Exchange Commission. 

1.14 “SEC Rule 144” means Rule 144 promulgated by the SEC under the Securities Act. 

1.15 “SEC Rule 145” means Rule 145 promulgated by the SEC under the Securities Act. 

  
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 1.16 “Securities Act” means the Securities Act of 1933, as amended, and the
rules and regulations promulgated thereunder. 
 1.17 “Selling Expenses” means all underwriting discounts, selling
commissions, and stock transfer taxes applicable to the sale of Registrable Securities, and fees and disbursements of counsel for any Holder. 

1.18 “Warrant Deed” means that certain Warrant Deed relating to Mavenir Group Holdings Limited originally dated
December 16, 2019, as amended and restated on February 5, 2020 and [•], 2020 (and as further amended, supplemented or otherwise modified from time to time). 

2. Registration Rights. The Company covenants and agrees as follows: 

2.1 Company Registration. If the Company proposes to register any of its ordinary shares under the Securities Act in connection with the
public offering of such securities by the Company solely for cash (other than in an Excluded Registration or the IPO), the Company shall, at such time, promptly give each Holder notice of such registration. Upon the request of each Holder given
within ten (10) days after such notice is given by the Company, the Company shall, subject to the provisions of Section 2.2, use commercially reasonable efforts to cause to be registered all of the Registrable
Securities that each such Holder has requested to be included in such registration. The Company shall have the right to terminate or withdraw any registration initiated by it under this Section 2.1 before the effective date
of such registration, whether or not any Holder has elected to include Registrable Securities in such registration. The expenses (other than Selling Expenses) of such withdrawn registration shall be borne by the Company in accordance with
Section 2.4. 
 2.2 Underwriting Requirements; SEC Cutback. 

(a) In connection with any offering involving an underwriting of ordinary shares of the Company pursuant to
Section 2.1, the Company shall not be required to include any of the Holders’ Registrable Securities in such underwriting unless the Holders accept the terms of the underwriting as agreed upon between the Company and
its underwriters, and then only in such quantity as the underwriters or managing underwriter in their or its sole discretion determine will not jeopardize or adversely affect the success, timing, pricing, and/or marketability of the offering by the
Company. If the total number of securities, including Registrable Securities, requested to be included in such offering exceeds the number of securities to be sold that the underwriters or managing underwriter in their or its reasonable discretion
determine is compatible with the success of the offering, then the Company and the Holders agree that the Registrable Securities held by the Holders shall be removed from such offering to the extent the underwriters or managing underwriter in their
or its sole discretion determine is required to not jeopardize the success, timing, pricing and/or marketability of the offering (which removal may include all Registrable Securities requested by the Holders to be included in such offering). If the
underwriters or managing underwriter determine that less than all of the Registrable Securities requested to be registered can be included in such offering in their or its sole discretion, then any Registrable Securities that are included in such
offering shall be allocated among the selling Holders in proportion (as nearly as practicable to) the number of Registrable Securities owned by each selling Holder or in such other 

  
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proportions as shall mutually be agreed to by all such selling Holders. For purposes of the provision in this Section 2.2 concerning apportionment, for any selling
Holder that is a partnership, limited liability company, or corporation, the partners, members, retired partners, retired members, stockholders, and Affiliates of such Holder, or the estates and Immediate Family Members of any such partners, retired
partners, members, and retired members and any trusts for the benefit of any of the foregoing Persons, shall be deemed to be a single “selling Holder,” and any pro rata reduction with respect to such “selling Holder” shall be
based upon the aggregate number of Registrable Securities owned by all Persons included in such “selling Holder,” as defined in this sentence. 

(b) If at any time the SEC takes the position that the offering of some or all of the Registrable Securities in a registration statement (alone
or together with previously or subsequently registered securities) is not eligible to be made on the form or in the manner proposed by the Company in such registration statement, the Company in its sole discretion may remove from the registration
statement such portion of the Registrable Securities and/or agree to such restrictions and limitations on the registration and resale of the Registrable Securities as the SEC may require to assure the Company’s compliance with the requirements
of the Exchange Act and/or the Securities Act. Any cut-back imposed on the Holders pursuant to this Section 2.2(b) shall be allocated among the Holders on a pro rata basis, unless the applicable
restrictions otherwise require or provide or the Holders otherwise agree. 
 2.3 Furnish Information and Cooperation; Obligations of
Holders. It shall be a condition precedent to the obligations of the Company to take any action pursuant to this Section 2 with respect to the Registrable Securities of any selling Holder that such Holder shall furnish
to the Company such information regarding itself, the Registrable Securities held by it, and the intended method of disposition of such securities and otherwise cooperate with the Company and execute such documents and certificates as reasonably
required to effect the registration of such Holder’s Registrable Securities. The Holders agree that, upon receipt of written notice from the Company of any stop order, or suspension of any registration statement covering Registrable Securities,
the suspension of the qualification of any Registrable Securities for sale in any jurisdiction, or that any prospectus included in a registration statement includes an untrue statement of a material fact or omission to state a material fact required
to be stated therein or necessary to make the statements therein, in the light of the circumstances under which they were made, not misleading, the Holders will immediately discontinue disposition of Registrable Securities pursuant to any
registration statement(s) covering such Registrable Securities. The Holders also covenant and agree that they will comply with the prospectus delivery requirements of the Securities Act or an exemption therefrom in connection with sales of
Registrable Securities pursuant to a registration statement. 
 2.4 Expenses of Registration. All expenses (other than Selling
Expenses) incurred in connection with registrations, filings, or qualifications pursuant to Section 2, including all registration, filing, and qualification fees, printers’ and accounting fees, and fees and
disbursements of counsel for the Company shall be borne and paid by the Company. All Selling Expenses relating to Registrable Securities registered pursuant to this Section 2 shall be borne and paid by the Holders pro rata
on the basis of the number of Registrable Securities registered on their behalf. 

  
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 2.5 Delay of Registration. No Holder shall have any right to obtain or seek an
injunction restraining or otherwise delaying any registration pursuant to this Agreement as the result of any controversy that might arise with respect to the interpretation or implementation of this Section 2. 

2.6 Indemnification. If any Registrable Securities are included in a registration statement under this
Section 2: 
 (a) To the extent permitted by law, the Company will indemnify and hold harmless each selling Holder
and each Person, if any, who controls such Holder within the meaning of the Securities Act or the Exchange Act, against any Damages, and the Company will pay to each such Holder or controlling Person any legal or other expenses reasonably incurred
thereby in connection with investigating or defending any claim or proceeding from which Damages may result, as such expenses are incurred; provided, however, that the indemnity agreement contained in this
Section 2.6(a) shall not apply to amounts paid in settlement of any such claim or proceeding if such settlement is effected without the consent of the Company, which consent shall not be unreasonably withheld, nor shall the
Company be liable for any Damages to the extent that they arise out of or are based upon actions or omissions made in reliance upon and in conformity with written information furnished by or on behalf of any such Holder or controlling Person for use
in connection with such registration. 
 (b) To the extent permitted by law, each selling Holder, severally and not jointly, will indemnify
and hold harmless the Company, and each of its directors, each of its officers who has signed the registration statement, each Person (if any), who controls the Company within the meaning of the Securities Act, legal counsel and accountants for the
Company, any underwriter (as defined in the Securities Act), any other Holder selling securities in such registration statement, and any controlling Person of any such underwriter or other Holder, against any Damages, in each case only to the extent
that such Damages arise out of or are based upon actions or omissions made in reliance upon and in conformity with written information furnished by or on behalf of such selling Holder for use in connection with such registration; and each such
selling Holder will pay to the Company and each other aforementioned Person any legal or other expenses reasonably incurred thereby in connection with investigating or defending any claim or proceeding from which Damages may result, as such expenses
are incurred; provided, however, that the indemnity agreement contained in this Section 2.6(b) shall not apply to amounts paid in settlement of any such claim or proceeding if such settlement is effected
without the consent of the Holder, which consent shall not be unreasonably withheld. 
 (c) Promptly after receipt by an indemnified party
under this Section 2.6 of notice of the commencement of any action (including any governmental action) for which a party may be entitled to indemnification hereunder, such indemnified party will, if a claim in respect
thereof is to be made against any indemnifying party under this Section 2.6, give the indemnifying party notice of the commencement thereof. The indemnifying party shall have the right to participate in such action and, to
the extent the indemnifying party so desires, participate jointly with any other indemnifying party to which notice has been given, and to assume the defense thereof with counsel reasonably satisfactory to the parties; provided,
however, that an indemnified party (together with all other indemnified parties that may be represented without conflict by one counsel) shall have the right to retain one separate counsel, with the fees and expenses to be paid by the
indemnifying party, if representation of such indemnified party by the counsel retained by 

  
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the indemnifying party would be inappropriate due to actual or potential differing interests between such indemnified party and any other party represented by such counsel in such action. The
failure to give notice to the indemnifying party within a reasonable time of the commencement of any such action shall relieve such indemnifying party of any liability to the indemnified party under this Section 2.6, only
to the extent that such failure materially prejudices the indemnifying party’s ability to defend such action. The failure to give notice to the indemnifying party will not relieve it of any liability that it may have to any indemnified party
otherwise than under this Section 2.6. 
 (d) To provide for just and equitable contribution to joint liability
under the Securities Act in any case in which either: (i) any party otherwise entitled to indemnification hereunder makes a claim for indemnification pursuant to this Section 2.6 but it is judicially determined (by the
entry of a final judgment or decree by a court of competent jurisdiction and the expiration of time to appeal or the denial of the last right of appeal) that such indemnification may not be enforced in such case, notwithstanding the fact that this
Section 2.6 provides for indemnification in such case, or (ii) contribution under the Securities Act may be required on the part of any party hereto for which indemnification is provided under this
Section 2.6, then, and in each such case, such parties will contribute to the aggregate losses, claims, damages, liabilities, or expenses to which they may be subject (after contribution from others) in such proportion as
is appropriate to reflect the relative fault of each of the indemnifying party and the indemnified party in connection with the statements, omissions, or other actions that resulted in such loss, claim, damage, liability, or expense, as well as to
reflect any other relevant equitable considerations. The relative fault of the indemnifying party and of the indemnified party shall be determined by reference to, among other things, whether the untrue or allegedly untrue statement of a material
fact, or the omission or alleged omission of a material fact, relates to information supplied by the indemnifying party or by the indemnified party and the parties’ relative intent, knowledge, access to information, and opportunity to correct
or prevent such statement or omission; provided, however, that, in any such case no Person guilty of fraudulent misrepresentation (within the meaning of Section 11(f) of the Securities Act) will be entitled to contribution from
any Person who was not guilty of such fraudulent misrepresentation. 
 (e) Notwithstanding the foregoing, to the extent that the provisions
on indemnification and contribution contained in the underwriting agreement entered into in connection with the underwritten public offering are in conflict with the foregoing provisions, the provisions in the underwriting agreement shall control.

 (f) Unless otherwise superseded by an underwriting agreement entered into in connection with the underwritten public offering, the
obligations of the Company and Holders under this Section 2.6 shall survive the completion of any offering of Registrable Securities in a registration under this Section 2, and otherwise shall
survive the termination of this Agreement or any provision(s) of this Agreement. 
 2.7 Reports Under Exchange Act. With a view to
making available to the Holders the benefits of SEC Rule 144, the Company shall: 
 (a) make and keep available adequate current public
information, as those terms are understood and defined in SEC Rule 144, at all times after the effective date of the registration statement filed by the Company for the IPO; 

  
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 (b) use commercially reasonable efforts to file with the SEC in a timely manner all reports
and other documents required of the Company under the Securities Act and the Exchange Act so long as the Company remains subject to such reporting requirements and the filing of such reports and other documents is required for the applicable
provisions of Rule 144; and 
 (c) furnish to any Holder, so long as the Holder owns any Registrable Securities, forthwith upon request
(i) to the extent accurate, a written statement by the Company that it has complied with the reporting requirements of SEC Rule 144 (at any time after ninety (90) days after the effective date of the registration statement filed by the
Company for the IPO), the Securities Act, and the Exchange Act (at any time after the Company has become subject to such reporting requirements); (ii) a copy of the most recent annual or quarterly report of the Company and such other reports and
documents so filed by the Company (unless otherwise available electronically at no additional charge via the SEC’s Electronic Data Gathering, Analysis and Retrieval system or any successor system known as “EDGAR”); and
(iii) such other information as may be reasonably requested in availing any Holder of SEC Rule 144. 
 2.8 “Market Stand-off” Agreement. Each Holder hereby agrees that it will not, without the prior written consent of the managing underwriter or underwriters, during the period commencing on the date of the
final prospectus relating to the registration by the Company of shares of its equity securities under the Securities Act on a registration statement on Form S-1 or Form
S-3, and ending on the date specified by the managing underwriter or underwriters (such period not to exceed one hundred eighty (180) days in the case of the IPO or ninety (90) days in the case of
any registration other than the IPO, or such other period as may be requested by the Company or an underwriter to accommodate regulatory restrictions on (1) the publication or other distribution of research reports and (2) analyst
recommendations and opinions, including, but not limited to, the restrictions contained in applicable FINRA rules, or any successor provisions or amendments thereto) (i) lend; offer; pledge; sell; contract to sell; sell any option or contract
to purchase; purchase any option or contract to sell; grant any option, right, or warrant to purchase; or otherwise transfer or dispose of, directly or indirectly, any ordinary shares or any securities convertible into or exercisable or exchangeable
(directly or indirectly) for ordinary shares held immediately before the effective date of the registration statement for such offering or (ii) enter into any swap or other arrangement that transfers to another, in whole or in part, any of the
economic consequences of ownership of such securities, whether any such transaction described in clause (i) or (ii) above is to be settled by delivery of securities, in cash, or otherwise. The underwriters in connection with such
registration are intended third-party beneficiaries of this Section 2.8 and shall have the right, power and authority to enforce the provisions hereof as though they were a party hereto. Each Holder further agrees to
execute such agreements as may be reasonably requested by the underwriters or managing underwriter in connection with such registration that are consistent with this Section 2.8 or that are necessary to give further effect
thereto. 
  

  
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 2.9 Restrictions on Transfer. 

(a) The Registrable Securities shall not be sold, pledged, or otherwise transferred, and the Company shall not recognize and shall issue
stop-transfer instructions to its transfer agent with respect to any such sale, pledge, or transfer, except upon the conditions specified in this Agreement, which conditions are intended to ensure compliance with the provisions of the Securities
Act. A transferring Holder will cause any proposed purchaser, pledgee, or transferee of the Registrable Securities held by such Holder to agree to take and hold such securities subject to the provisions and upon the conditions specified in this
Agreement. Notwithstanding the foregoing, the Company shall not require any transferee of shares pursuant to an effective registration statement or, following the IPO, SEC Rule 144, in each case, to be bound by the terms of this Agreement. 

(b) Each certificate, instrument, or book entry representing Registrable Securities and each certificate issued in exchange for or upon the
transfer of any Registrable Securities (unless such Registrable Securities would no longer be Registrable Securities after such transfer) be notated with a legend substantially in the following form: 

THE SECURITIES REPRESENTED HEREBY HAVE BEEN ACQUIRED FOR INVESTMENT AND HAVE NOT BEEN REGISTERED UNDER THE SECURITIES ACT OF 1933. SUCH SHARES
MAY NOT BE SOLD, PLEDGED, OR TRANSFERRED IN THE ABSENCE OF SUCH REGISTRATION OR A VALID EXEMPTION FROM THE REGISTRATION AND PROSPECTUS DELIVERY REQUIREMENTS OF SAID ACT. 

THE SECURITIES REPRESENTED HEREBY MAY BE TRANSFERRED ONLY IN ACCORDANCE WITH THE TERMS OF AN AGREEMENT BETWEEN THE COMPANY AND THE STOCKHOLDER,
A COPY OF WHICH IS ON FILE WITH THE SECRETARY OF THE COMPANY. 
 The Holders consent to the Company making a notation in its records and
giving instructions to any transfer agent of the Restricted Securities in order to implement the restrictions on transfer set forth in this Section 2.9. 

(c) The holder of such Restricted Securities, by acceptance of ownership thereof, agrees to comply in all respects with the provisions of this
Section 2. Before any proposed sale, pledge, or transfer of any Restricted Securities, unless there is in effect a registration statement under the Securities Act covering the proposed transaction or following the IPO, the
transfer is made pursuant to SEC Rule 144, the Holder thereof shall give notice to the Company of such Holder’s intention to effect such sale, pledge, or transfer, provided that no such notice shall be required in connection if the
intended sale, pledge or transfer complies with SEC Rule 144. Each such notice shall describe the manner and circumstances of the proposed sale, pledge, or transfer in sufficient detail and, if reasonably requested by the Company, shall be
accompanied at such Holder’s expense by either (i) a written opinion of legal counsel who shall, and whose legal opinion shall, be reasonably satisfactory to the Company, addressed to the Company, to the effect that the proposed
transaction may be effected without registration under the Securities Act; (ii) a “no action” letter from the SEC to the effect that the proposed sale, pledge, or transfer of such Restricted Securities without registration will not
result in a recommendation by the staff of the SEC that action be taken with respect thereto; or (iii) any other evidence reasonably satisfactory to counsel to the Company to the effect that the proposed sale, pledge, or transfer of the
Restricted Securities may be effected without registration under the Securities Act, whereupon the Holder of such Restricted Securities shall be entitled to sell, pledge, or transfer such Restricted Securities in accordance with the terms of the
notice given by the Holder to the Company. The Company will not require such a notice, legal opinion or “no action” letter (x) in any transaction in compliance 

  
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with SEC Rule 144; or (y) in any transaction in which such Holder distributes Restricted Securities to an Affiliate of such Holder for no consideration; provided that with respect to
transfers under the foregoing clause (y), each transferee agrees in writing to be subject to the terms of this Section 2.9. Each certificate, instrument, or book entry representing the Restricted Securities
transferred as above provided shall be notated with, except if such transfer is made pursuant to SEC Rule 144, the appropriate restrictive legend set forth in Section 2.9(b), except that such certificate instrument, or book
entry shall not be notated with such restrictive legend if, in the opinion of counsel for such Holder and the Company, such legend is not required in order to establish compliance with any provisions of the Securities Act. 

2.10 Termination of Registration Rights. The right of any Holder to request inclusion of Registrable Securities in any registration
pursuant to Section 2.1 shall terminate upon the third (3rd) anniversary of the IPO. 
 3. Miscellaneous. 

3.1 Governing Law. This Agreement shall be governed by the internal law of the State of New York, without regard to conflict of law
principles that would result in the application of any law other than the law of the State of New York. 
 3.2 Counterparts. This
Agreement may be executed in multiple counterparts, including by means of facsimile, each of which shall be deemed an original, but all of which together shall constitute the same instrument. 

3.3 Titles and Subtitles. The titles and subtitles used in this Agreement are for convenience only and are not to be considered in
construing or interpreting this Agreement. 
 3.4 Notices. All notices, requests, demands and other communications required or
permitted hereunder shall be made in writing by hand-delivery, mail, email, fax or air courier guaranteeing delivery: 
 (a) If to the
Company, to: 
 Mavenir plc 

11th Floor, 200 Aldersgate Street 

London, United Kingdom, 
 EC1A
4HD 
 Attention: the Directors 

Email: legalnotices@mavenir.com 

With a copy (which shall not constitute notice) to: 

Sidley Austin LLP 
 555
California Street, Suite 2000 
 San Francisco, CA 94104 

USA 
 Attention: Vijay Sekhon;
Ayo Badejo 
 Email: vsekhon@sidley.com; abadejo@sidley.com 

or to such other person or address as the Company shall furnish to the Holders in writing. 

  
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 (b) If to any Holder, to such address as indicated on the Schedule of
Investors attached as Schedule A hereto or to such other person or address as the Holder shall furnish to the Company in writing. 
 All
such notices, requests, demands and other communications shall be deemed to have been duly given: at the time of delivery by hand, if personally delivered; three business days after being deposited in the mail, postage prepaid, if mailed
domestically in the United States (and five business days if mailed internationally); when sent, if by email; when receipt acknowledged, if faxed; and on the business day for which delivery is guaranteed, if timely delivered to an air courier
guaranteeing such delivery. 
 3.5 Amendments. This Agreement may be amended only by an instrument in writing executed by the Company
and the Holders holding a majority of the Registrable Securities collectively held by them. Any such amendment will apply to all Holders equally, without distinguishing between them. 

3.6 Severability. The invalidity or unenforceability of any specific provision of this Agreement shall not invalidate or render
unenforceable any of its other provisions. Any provision of this Agreement held invalid or unenforceable shall be deemed reformed, if practicable, to the extent necessary to render it valid and enforceable and to the extent permitted by law and
consistent with the intent of the parties to this Agreement. 
 3.7 Entire Agreement. This Agreement constitutes the entire agreement
and understanding of the parties with respect to the transactions contemplated hereby and thereby. The registration rights granted under this Agreement supersede any registration, qualification or similar rights with respect to any of the shares
granted to one or more Holders under any other agreement, and any of such preexisting registration rights are hereby terminated. 
 3.8
Dispute Resolution. The parties to this Agreement hereby agree to submit to the jurisdiction of the courts of the United States District Court for the Southern District of New York and appellate courts thereof in any action or proceeding
arising out of or relating to this Agreement. 
 3.9 No Assignment by Holders. No Holder shall be permitted to assign or transfer any
right or obligation under this Agreement without the prior written consent of the Company. 
 [Signature Page Follows] 

  
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 IN WITNESS WHEREOF, the parties have executed this Registration Rights Agreement as of the
date first written above. 
  

			
	COMPANY:
	
	MAVENIR PLC
		
	By:	 	  

		
	Name:	 	  

		
	Title:	 	  

	
	INVESTORS:
		
	[•]	 	
		
	By:	 	  

		
	Name:	 	  

		
	Title:	 	

 SIGNATURE PAGE TO REGISTRATION
RIGHTS AGREEMENT 

 SCHEDULE A 

INVESTORS 
  

	
	 Name and Address
  

	 Investor Name
 Address

Phone Number
 Email

[Counsel cc, if any]]

	
	 Investor Name
 Address

Phone Number
 Email

[Counsel cc, if any]]

	
	 Investor Name
 Address

Phone Number
 Email

[Counsel cc, if any]]EX-10.1

 Exhibit 10.1 

EXECUTIVE EMPLOYMENT AGREEMENT 

This Executive Employment Agreement (this “Agreement” ) is made and entered into on this 24th day of December, 2016, by and
between Sierra Private Investments, L.P., a Cayman Islands limited partnership (the ‘Company”), and Pardeep Kohli (“Executive”). 

RECITALS 
 WHEREAS,
the Company has entered into an Agreement and Plan of Merger, dated as of December 18, 2016, with Ranzure Networks Inc., a Delaware corporation (“Ranzure), pursuant to which Ranzure will become an indirect subsidiary of the Company
(the “Merger”); 
 WHEREAS, in connection with the Merger, the Company desires to offer employment to Executive
through one of its subsidiaries, as may be designated from time to time by the Company by notice in writing (together with the Company, such entity being the “Employing Entity”) effective as of December 19, 2016, and Executive
desires to be employed by the Employing Entity effective as of December 19, 2016, and to render services in the management of certain aspects of the business and affairs conducted by Ranzure, Xura, Inc., Mitel Mobility Inc. and their affiliates
as soon as they are (now or, upon their acquisition, become) directly or indirectly controlled by the Company (collectively, the “Business”) on and subject to the terms set forth herein; 

WHEREAS, Ranzure and Executive have entered into that certain employment agreement, originally dated May 25, 2016 (the
“Prior Employment Agreement”), which, from and after the effectiveness of this Agreement, shall be terminated and replaced in its entirety by this Agreement. This Agreement shall govern the employment relationship between Executive
and the Employing Entity and its affiliates from and after the date of this Agreement and supersedes and negates all previous agreements with respect to such relationship, including, without limitation, the Prior Employment Agreement; and 

WHEREAS, the Company and Executive desire to set forth in this Agreement the terms under which Executive will serve as Chief Executive
Officer of the Business, which will include appointing Executive as the Chief Executive Officer of Sierra Private Holdings II, Ltd. (“Sierra”), and such other entities as the Company desires to designate Executive as Chief Executive
Officer and Executive agrees to such designation. 
 NOW, THEREFORE, in consideration of the promises and mutual agreements contained
herein, the parties hereby agree as follows: 
 1. Effective Date; Employment Term. This Agreement shall become effective as of
December 19, 2016 (the “Effective Date”). The Company agrees to employ Executive, and Executive agrees to serve the Company, on an “at will” basis, which means that either the Company or Executive may terminate
Executive’s employment with the Company at any time and for any or no reason, as provided in and subject to Section 5 below. The term of this Agreement shall commence on the Effective Date and continue until Executive’s employment
terminates for any reason in accordance with the terms of this Agreement (the “Employment Term”). If the closing of the Merger (the “Closing”) does not occur, and the Merger Agreement

 
is terminated, then upon prompt written notice of either party to the other, the Employment Term shall then end, and the Company shall not have any obligations hereunder, other than payment of
any salary and other compensation and benefits then accrued. In that event, the Prior Employment Agreement shall be reinstated, and the Company shall not owe any Severance Pay under section 5.2(c) to Executive. 

2. Position and Duties. 

2.1 Generally. Executive shall serve as Chief Executive Officer (“CEO”) of the Business, which will include appointing
Executive as the Chief Executive Officer of Sierra, and such other entities as the Company desires to designate Executive as Chief Executive Officer and Executive agrees to such designation, and shall have the general management duties,
responsibilities, functions and authority customarily exercised by a CEO, subject to the powers, authority and direction of the Board of Directors of Sierra Private Holdings II, Ltd. (the “Board”); provided that, following written notice
from the Board the term “Board” as used herein shall instead refer to the board of directors, board of managers or Similar governing body of any designated affiliate of the Company, Executive may be given, and if given shall exercise, such
other management authority, responsibilities and opportunities in other areas of the Business’s affairs as may be assigned to Executive by the Board from time to time. Executive shall report to the Board. 

2.2 Performance of Duties. During the Employment Term, Executive shall devote his full business and professional time, attention and
effort exclusively to the management of the affairs of the Business and the other areas of the Company’s (and its affiliates’) business and affairs as may be assigned to Executive as provided in Section 2.1. It shall not be a
violation of this Agreement for Executive to manage personal investments, as long as such activities do not interfere in any material respect with the performance of Executive’s duties hereunder and are not directly or indirectly in conflict or
competitive with, or adverse to, the Company, Executive may, at this option perform his duties from Dallas. Texas with reasonable accommodation for business travel. 

3. Compensation. For his services under this Agreement, subject to Section 5.2, during the Employment Term Executive shall be
entitled to receive the following compensation, commencing as of the Effective Date: 
 3.1 Base Salary . During the Employment Term,
Executive shall be entitled to an annual base salary (the “Base Salary”) at the rate of four hundred and fifty thousand dollars ($450,000) per annum. The Base Salary shall be paid in substantially equal periodic installments in
accordance with the Employing Entity’s regular payroll schedule. All payments shall be subject to such withholdings or deductions as may be required by law to be made on account of any taxes or social security contributions of any jurisdiction
.. The Base Salary shall be reviewed in good faith by the Board, based upon Executive’s performance, including upon the assignment of new or additional responsibilities, not less often than annually and may be increased, but not decreased. 

  
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 3.2 Annual Performance Bonus. Executive shall be eligible for an annual incentive
bonus (the “Annual Performance Bonus”) for each full fiscal year in the Employment Term (pro rated for the first fiscal year that ends after the Effective Date), provided that Executive remains employed in good standing on the date
such Annual Performance Bonus is paid. As CEO of the Business, Executive’s inventive bonus will be based on such terms and conditions (including any applicable performance criteria) as determined by the Board, in its sole discretion.
Executive’s target bonus opportunity will be equal to 150% of Executive’s Base Salary, subject to the terms of the applicable bonus plan, payable in the form of a lump sum as soon as practicable, but in no event later than March 15th of
the calendar year that immediately follows the calendar year to which the cash bonus relates. 
 3.3 Long Term Incentive Plan. Prior
to the Closing, the Company will adopt a long term incentive plan (the “LTIP”) in a form and with such terms as are reasonably acceptable to Executive. Executive shall be granted one or more awards under the LTIP (each, an
“Award”) which shall be subject to the terms of the LTIP. 
 3.4 Cash Bonus. Executive shall be entitled to
participate in a cash bonus opportunity (the “Cash Bonus”) based on the performance of the Business with an initial notional value of $663,409. Subject to Executive’s continued employment under this Agreement, twenty- five
percent (25%) of the Cash Bonus shall vest annually on each of the first four anniversaries of the Effective Date and be payable on a Change in Control (as defined in Section 5.1(d) of this Agreement). In the event of a Change in Control while
the Executive remains employed under this Agreement, the full amount of the Cash Bonus earned shall vest and become payable pursuant to its terms to Executive. 

3.5 Participation in Benefit Programs During the Employment Term, Executive shall be entitled to participate in all of the employee
benefit plans and programs for which similarly situated executives of the Employing Entity are generally eligible. 
 3.6 Vacation and
Paid Holidays. During each calendar year of the Employment Term, Executive shall be entitled to four (4) weeks of paid time off in accordance with the Employing Entity’s normal vacation policies and procedures. Additionally, Executive
shall be eligible for paid holidays in accordance with the Employing Entity’s policies. 
 3.7 Indemnification and Insurance.
Executive shall be indemnified and advanced expenses to the full extent provided for in the constituent formation documents of the Company (including its limited partnership agreement, as hereafter amended from time to time (the
“LPA”)) and to the maximum extent that the Company indemnifies and advances expenses to any of its other directors and senior executive officers against all costs, charges, liabilities and expenses incurred or sustained by Executive
in connection with any action, suit or proceeding to which Executive may be made a party by reason of Executive being or having been a director, officer or employee of the Company or any of its affiliates or Executive serving or having served any
other enterprise. plan or trust as a director, officer, employee or fiduciary at the request of the Company or any of its affiliates (other than any dispute, claim or controversy arising under or relating to this Agreement (except for this
Section 3.7)). The rights to indemnification and advancement of expenses provided by the LPA shall be deemed to be separate contract rights between the Company and Executive, and no repeal or modification of any of such provisions shall
adversely affect any right or obligation of Executive existing at the time of such repeal or modification with respect to any state of facts then or previously existing or any proceeding 

  
 3 

 
previously or thereafter brought or threatened based in whole or in part upon any such state of facts. In addition, Executive will be entitled to be protection of, and the Company shall cause
Executive to be covered by, any insurance policies the Company may elect to maintain generally for the benefit of its directors and senior executive officers and, to the extent not already maintained by Sierra, as of the Effective Date the Company
shall obtain Directors and Officers Insurance (“D&O Insurance”) for a coverage amount customary for companies the size of the Business and shall cause Executive to be covered by such D&O Insurance. 

4. Expenses. In accordance with the Employing Entity’s reimbursable business expense policies and procedures, as adopted from time
to time, the Executive shall be paid or reimbursed for reasonable out-of-pocket expenses incurred by Executive during the Employment Term in conducting the
Business’s affairs and in connection with the performance of his duties under this Agreement (such being “Reimbursable Expenses”). It is understood and agreed that Executive may, at his option, continue to reside in Texas and
travel to the Business’s locations as is appropriate to perform his duties under this Agreement, with reasonable and documented out-of-pocket expenses for said
travel and related expenses (including accommodations) to be reimbursed by the Employing Entity in accordance with that Employing Entity’s policies. 

5. Termination of Employment. 

5.1 Termination. 
 (a)
Executive’s employment hereunder, and the Employment Term, may be terminated (i) at any time by the Board, the Company or the Employing Entity, in the event of Cause, (ii) by the Board, the Company, or the Employing Entity for any
reason other than in the event of Cause, death or Disability (this Section 5.1(a)(ii) collectively, “Without Cause”), with at least 90 days’ advance written notice to Executive, (iii) at any time in the event of
Executive’s death, (iv) at any time in the event that Executive has a Disability, (v) by Executive for Good Reason (“Good Reason”), or (vi) by Executive without Good Reason, with at least 90 days’ advance
written notice to the Company. 
 (b) “Cause” shall be defined as (i) the continued failure to substantially perform
any lawful and appropriate duties assigned by the Company, the Board or the Employing Entity (other than a failure resulting from Executive’s illness or injury), (ii) the failure or refusal to substantially comply with any lawful employment
policies or directives, (iii) engaging in any conduct that is demonstrably injurious to the Business, the Company or any of its affiliates, monetarily or otherwise, including embezzlement, misappropriation of property, misappropriation of a
corporate opportunity, or other conduct that, in the reasonable judgment of the Company or the Board, amounts to gross incompetence, (iv) any act of dishonesty, moral turpitude or willful misconduct, (v) conviction of, or the entering of a
plea of nolo contendere or guilty with respect to, any felony (of any nature) or any significant violation of a statutory or common law duty of loyalty to the Company or any of its affiliates, or (vi) unlawful use (including being
under the influence) or possession of illegal drugs on the premises of the Company or any of its affiliates; provided, that, a deficiency contained solely in clause (i) or (ii) shall be the basis for a termination for Cause only if Executive
shall have failed to cure the deficiency after having been provided a period of 30 days following notice to cure the deficiency, if curable. 

  
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 (c) “Good Reason” shall be defined as, without Executive’s written
consent, the occurrence of any of the following events: (i) a diminution in Executive’s Base Salary below the amount set forth in this Agreement; (ii) a material diminution in Executive’s authority, duties or responsibilities
below those set forth in this Agreement; (iii) the relocation of the offices or facility at which Executive is employed to a location more than 75 miles from the office or facility where Executive is principally employed (excluding business
travel), which shall initially be in Richardson, Texas; or (iv) a material breach by the Board, the Company or the Employing Entity of any material term or provision of this Agreement. Notwithstanding in this Section 5.1(c) to the
contrary, Good Reason shall not exist unless (x) Executive provides written notice to the Company within 90 days after the initial occurrence of any of the events listed in (ii) or (iii) of this Section, (y) the event or condition is
not cured within 30 days following their receipt of Executive’s written notice and (z) Executive’s termination date is effective at least 30 but not more than 60 days following the expiration of the cure period as described in the
immediately preceding clause (y). 
 (d) “Change in Control” shall mean a change in ownership or control of the Company or
the Business effected through any of the following transactions: 
 (i) the closing of a merger, consolidation or other reorganization in
which a change in ownership or control of the Company or the Business is effected through the acquisition by any person or group of persons comprising a “group” within the meaning of Rule 13d-5(b)(l)
of the Securities Exchange Act of 1934, as amended (the “Exchange Act”) (other than the Company or an entity, group or person that, prior to such transaction, directly or indirectly controls, is controlled by or is under common
control with, the Company) of beneficial ownership (within the meaning of Rule l3d-3 of the Exchange Act) of (x) securities possessing more than fifty percent (50%) of the total combined voting power of
the Company’s outstanding securities or (y) more than fifty percent (50%) of the Business (as measured in terms of revenues of the Business), whether through ownership or control of (A) one or more entities that directly or indirectly
own or control the Business or (B) the assets of the Business; provided that neither the Merger nor the acquisition of Mitel Mobility will constitute a Change in Control for purposes of this Agreement; 

(ii) the closing of a sale, transfer or other disposition (other than to an entity, group or person that, prior to such transaction, directly
or indirectly controls, is controlled by or is under common control with, the Company) of all or substantially all of the assets of the Company or the Business; provided that neither the Merger nor the acquisition of Mitel Mobility will constitute a
Change in Control for purposes of this Agreement; or 
 (iii) the closing of any transaction or series of related transactions pursuant to
which any person or any group of persons comprising a “group” within the meaning of Rule 13d-5(b)(1) of the Exchange Act (other than the Company or an entity, group or person that, prior to such
transaction or series of related transactions, directly or indirectly controls, is controlled by or is under common control with, the Company) acquires directly or indirectly (whether as a result of a single acquisition or by reason of one or more
acquisitions within the twelve (12)-month period ending with the most recent acquisition) beneficial ownership (within the meaning of Rule 13d-3 of the Exchange Act) of (x) securities possessing more than
fifty percent (50%) of the total combined voting power of the Company’s 

  
 5 

 securities outstanding immediately after the consummation of such transaction or series of related
transactions, whether such transaction involves a direct issuance from the Company or the acquisition of outstanding securities held by one or more of the Company’s existing stockholders or (y) more than fifty percent (50%) of the Business
(as measured in terms of revenues of the Business), whether through ownership or control of (A) one or more entities that directly or indirectly own or control the Business or (B) the assets of the Business; provided that neither the
Merger nor the acquisition of Mitel Mobility will constitute a Change in Control for purposes of this Agreement. 
 (e)
“Disability” shall be defined as the total and permanent inability of Executive to perform his duties hereunder on account of a physical or mental illness or condition, determined by a licensed physician agreed upon by the Company
and Executive. 
 5.2 Compensation Upon Termination. 

(a) Except as otherwise expressly provided herein in the event of any termination of Executive’s employment by the Company, the Board,
the Employing Entity, or Executive, all compensation described herein shall cease as of the date of Executive’s separation from service. 

(b) If (i) Executive’s employment hereunder terminates in the event of his death or Disability, (ii) Executive terminates his
employment hereunder other than for Good Reason, or (iii) the Board, the Employing Entity or the Company terminates Executive’s employment hereunder in the event of Cause, then, in each such case, Executive shall not be entitled to any
compensation or payments other than (A) Base Salary earned on or prior to the date of Executive’s separation from service and (B) other vested benefits, if any exist, which will be handled in accordance with their controlling plans and
documents. 
 (c) In the event that : (x) the Company, the Employing Entity or the Board terminates Executive’s employment Without
Cause or (y) Executive terminates his employment for Good Reason, then, in either case, Executive shall not be entitled to receive any compensation or payments other than (A) Base Salary earned on or prior to the date of Executive’s
separation from service; (B) accelerated vesting with respect to all Awards held by Executive, such that all Awards that would vest based solely on the passage of time within the twelve (12) month period in following the date of such
termination shall vest effective as of the date of termination; (C) continued payment of Executive’s Base Salary over a period equal to twelve (12) months; (D) a pro rata portion of the Annual Performance Bonus actually earned for the
fiscal year of the termination, based upon the first day of such bonus period through the day Executive’s employment terminated; (E) one (1) year of accelerated vesting with respect to the Cash Bonus; and (F) reimbursement of the
health and dental care continuation premiums for Executive and Executive’s dependents incurred by Executive to effect continued participation in group health and dental plan benefits to the extent authorized by and consistent with 29 U.S.C.
§ 1161 et seq. (commonly known as “COBRA”) for Executive and Executive’s dependents on the same basis as active employees, to the extent that Executive is eligible for and elects continuation coverage under COBRA, until
the earlier of (x) the twelve (12) month anniversary of the date of such termination of employment and (y) the date that Executive becomes eligible to participate in any other group health plan, such as that of a spouse or a new
employer (collectively, all such compensation and other amounts pursuant to Section 5.2(c)(B)- (F) being “Severance Pay”). 

  
 6 

 (d) Notwithstanding any other provision of this Agreement, no Severance Pay shall be due or
payable unless and until Executive executes a release of claims (which release becomes effective and irrevocable within 60 days following Executive’s separation from service) in form and substance satisfactory to the Company (so long as the
terms and conditions thereof are not in conflict with this Agreement and such form and substance reasonably represents market practice) (the “Release”). The Severance Pay due and payable hereunder, if any, shall be paid beginning on
the first regular payroll date that occurs more than 60 days following Executive’s separation from service; provided, that any bonus payable pursuant to clause (D) of Section 5.2(c) shall be paid as and when other executive bonuses are
payable for the fiscal year of termination but in no event later than the end of the year following the year in which the termination occurs; provided, further, that Awards and the Cash Bonus shall be payable (to the extent vested) pursuant to their
terms. 
 6. Confidential Information. When used in this Agreement, “Confidential Information” shall mean any and all
information of or pertaining to the Company or any of its affiliates or related parties or any of their respective past, prospective businesses, business plans, products, services, research development, operations, manufacturing or operating
methods, know-how, personnel, assets, liabilities, properties, customers, vendors, suppliers, technology, hardware, marketing, pricing, strategies, research, development, financial condition, results of
operations, projections, forecasts, budgets transactions, regulatory affairs, Intellectual Property, discoveries, inventions, methodologies, processes, software, specifications, designs, drawings, data, techniques, strategies, plans, prospects, know-how and ideas, including all information made available to Executive or observed or learned by Executive in connection with his employment hereunder or service on the Board (if applicable), as well as any
information and materials that summarize, contain, are based on, are copied, derived or extracted from or otherwise reflect in whole or part any such information. Such term does not, however, include any such information that becomes or is already
generally known to the public other than, directly or indirectly, as a result of disclosure by Executive. 
 Executive acknowledges that
employment or continued employment by the Company or the Employing Entity will result in Executive’s exposure and access to Confidential Information. Except as required to perform Executive’s responsibilities for the Business, to comply
with law or regulation, or as authorized in writing by the Company, Executive shall hold all Confidential Information in the strictest confidence and shall not, at any time during or after Executive’s employment, use, disclose, or take any
action that may result in the use or disclosure of any Confidential Information until such time as such information is generally known to the public other than, directly or Indirectly, as a result of disclosure by Executive. 

7. Property. Immediately upon request or the termination of Executive’s employment hereunder, whichever occurs first, Executive
shall return to the Company and its affiliates all of their respective Confidential Information and other property, and all property of any third party that is in Executive’s possession or control by virtue of his employment or service on the
Board (if applicable). Property to be returned shall include, without limitation, all such documents and things (whether in tangible or electronic format and whether or not containing any Confidential Information) in Executive’s possession or
control, including all computer programs, files and diskettes, and all written or printed files, manuals, contracts, memoranda, forms, notes, records and charts. 

  
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 8. Intellectual Property Rights. Executive shall not, at any time, have or claim any
right, title or interest in or to any trade name, patent, trademark, service mark, trade dress, trade design, logo, copyright, intellectual property, methodology, technology, procedure, concept, idea or other similar right or asset (collectively,
“Intellectual Property”) belonging to the Company or any of its affiliates, or any third party with which any of them conducts business. Executive shall not have or claim any right, title or interest in or to any material or matter
of any kind prepared for, or used in connection with, the business or promotion of the Company or any of its affiliates, or any third party with which any of them conduct business, whether produced, prepared or published in whole or in part by
Executive, the Company, any of its affiliates, or any third party with which any of them conduct business. All Intellectual Property that is conceived, devised, made, developed, reduced to practice or perfected by Executive, alone or with others,
during the Employment Term (whether or not on the Employing Entity’s premises or during business hours) that is related in any way to the past, current or future business or products of the Company or any of its affiliates or is devised, made,
developed, reduced to practice or perfected utilizing personnel, equipment or facilities of the Company or any of its affiliates (“Company Inventions”) shall be promptly disclosed by Executive to the Board, shall be deemed
“works for hire” and shall immediately upon creation become the sole, absolute and exclusive property of the Company. If and to the extent that any of such Intellectual Property should be determined for any reason not to be a work for
hire, Executive hereby assigns to the Company all of Executive’s right, title and interest in and to such Intellectual Property. To the extent not previously conveyed or assigned to the Company, Executive further assigns to the Company all
Intellectual Property that, in whole or in part, was or is (i) conceived devised, made, developed, reduced to practice or perfected by Executive, alone or will others, during the Employment Term (whether or not on the Employing Entity’s
premises or during business hours), or (ii) was or is devised, made, developed, reduced to practice or perfected utilizing personnel, equipment or facilities of the Company or any of its affiliates, At the reasonable request and expense of the
Company or any of its affiliates but without charges, whether during or at any time after Executive’s employment. Executive shall cooperate fully with the Company and any of its affiliates to secure any Intellectual Property protection or other
similar rights in the United States and/or in foreign countries, including the execution and delivery of assignments, patent applications and other documents or papers. 

9. Non-Competition and Non-Solicitation. 

9.1 Non-Competition 

(a) Executive acknowledges that he will have in his employment or other involvement with the Company and its affiliates, access to
Confidential Information that, if disclosed, would assist in competition against the Company and/or its affiliates and that Executive will also generate goodwill for the Company and its affiliates in the course of his employment. Therefore,
Executive hereby agrees that Executive will not: 
  

  
 8 

 (i) during the period beginning on the Effective Date and ending on the eighteen
(18) month anniversary of the termination of Executive’s employment (“Restrictive Period”), without the prior written consent of the Company, the Board or the Employing Entity, which consent may be withheld for any reason or for
no reason, directly or indirectly, for Executive’s own account or for the account of others, as an officer, director, securityholder (passive or otherwise), owner, member, unitholder, partner, promoter, consultant, advisor, employee, manager or
otherwise, participate in the promotion, financing, ownership, operation or management of, or assist in, furnish advice with respect to, or carry on through a proprietorship, partnership, joint venture, corporation, other form of business entity or
otherwise, any business that is engaged in, or planning to engage in, a Competing Business in any state in the United States in which the Company or any of its affiliates then conducts business or any foreign country in which the Company or any of
its affiliates then conducts business; provided, however, that nothing in this Section 9.1 will prohibit Executive from holding or acquiring beneficial ownership of 1% or less of any class of interests that is listed for trading
on a national securities exchange, provided such ownership is passive in nature; 
 (ii) during the Restrictive Period, directly or
indirectly advise or encourage any current customer (or any previous customer within the last twelve months) of the Company or any of its affiliates not to conduct business with the Company or any of its affiliates or solicit or do business with any
such customer relating to a Competing Business; 
 (iii) during the Restrictive Period, directly or indirectly furnish advice to, solicit or
do business with any suppliers or vendors, including any importers, exporters, or direct trade partners (or any previous supplier or vendor within the twelve months immediately preceding the relevant measurement date), of the Company or any of its
affiliates relating to a Competing Business; or 
 (iv) during the Restrictive Period, either on Executive’s own behalf or for any
other person (other than the Company or any of its affiliates) (1) hire, solicit, interfere with or endeavor to cause any employee of the Company or any of its affiliates to leave his or her employment, or (2) induce or attempt to induce
any such employee to breach his or her employment agreement with the Company or any of its affiliates. Notwithstanding the foregoing, nothing herein is intended to prevent, or will prevent, the Executive from directly or indirectly making any
general solicitation of employment which is not directed specifically to any such employee of the Company. 
 (1) “Competing
Business” means a business (A) that engages in the business of the Company or any of its affiliates, including developing, marketing, offering, making, importing, offering for sale, licensing, selling, distributing and supporting and
providing related services with respect to products of the Company’s subsidiaries and any other telecommunications solutions that enable the delivery of data, voice, video, messaging, voicemail, rich communications and/or enhanced messaging
services around the world; or (B) that is the subject of the Company’s or such affiliate’s actual or demonstrably anticipated research and development. During the Employment Term, the Company may in its absolute discretion from time to
time designate any additional (but perhaps not obvious) partnership, firm, association, syndicate, company or other entity as a directly competitive business for purposes of this paragraph, upon providing written notice of such designation to the
Executive; provided, however, that the definition of Competing Business herein is not intended to apply to services with respect to which Executive has no direct or indirect role in his capacity as Chief Executive Officer of the
Business. 

  
 9 

 (b) If Executive breaches this covenant not to compete, it is understood and agreed that
damages, if any, for the breach of this covenant not to compete will accrue and be recoverable by the Company and the Employing Entity as of and from the date of the breach insofar as the damages for such breach relate to an action that occurred
within the scope of the geographic area and duration of the covenant not to compete. 
 (c) This Section 9.1 does not prohibit
Executive from engaging in business on behalf of, or providing service to, Siris Capital Group, LLC or any of its portfolio companies. 
 9.2
Acknowledgment. Executive acknowledges that he has carefully read and considered the provisions of this Section 9. Executive acknowledges that he believes that he has received and will receive sufficient consideration and other benefits
to justify the foregoing restriction. 
 9.3 Severability. The Company and Executive intend this Section 9 to be enforced as
written. Nonetheless, if any provisions of this Section 9 as applied in whole or in part to any circumstances are ruled by an arbitrator or court of competent jurisdiction to be invalid or unenforceable, then the ruling shall not affect any
other provision of this Section 9, the application of such provision in any other circumstances or jurisdiction, or the validity or enforceability of this Agreement as a whole or any other provision hereof. If any provision of this
Section 9 is so ruled unenforceable, the court or arbitrator making such determination shall have the authority to (and in the case of such a ruling the parties shall request such court or arbitrator to) reduce the duration, scope,
applicability or geographical coverage of such provision, or delete specific words or phrases in such provision, in each case to the minimum extent necessary such that, in its reduced form, such provision shall then be enforceable as nearly as
possible to the provision as written. 
 9.4 Breach and Effect on Base Salary and Annual Performance Bonus. Any breach of any of the provisions of this Section 9 or of Section 10 by Executive shall terminate all rights to receive any Base Salary, Annual Performance Bonus, Severance Payment and any other amounts
referenced in Section 3 or otherwise due to Executive in respect of his employment. 
 10.
Non-Disparagement. Executive covenants and agrees that he will not, directly or indirectly, at any time, make, publish or communicate to any person or in any private or public forum any critical,
defamatory or disparaging remarks, comments or statements concerning, or take any other action that is intended to or could reasonably be expected to impugn the business, personal or professional character, reputation or integrity of, the Company,
any of its affiliates or any of its existing or prospective personnel, customers, suppliers, investors, businesses, business practices, prospects, products or services. The Company covenants and agrees that it will instruct its Board and executive
officers not to, directly or indirectly, at any time, make, publish or communicate to any person or in any private or public forum any critical, defamatory or disparaging remarks, comments or statements concerning, or take any other action that is

  
 10 

 
intended to or could reasonably be expected to impugn the personal or professional character, reputation or integrity of, Executive. This Section 10 does not, in any way, restrict or impede
Executive or the Company from exercising legally protected rights to the extent that such rights cannot be waived by agreement or from complying with any applicable law or regulation or a valid order of a court of competent jurisdiction or an
authorized government agency; provided that such compliance does not exceed that required by such law, regulation or order. In that event, Executive and the Company shall promptly provide written notice thereof to the other party. 

11. Survival. The ongoing obligations and interpretive provisions set forth in this Agreement, including Sections 6 through 10, Section
13 and Section 15 of this Agreement, shall survive and continue in full force and effect in accordance with their terms notwithstanding the termination or expiration of this Agreement or the Employment Term. 

12. At-Will Employment; Board Service. Nothing in this Agreement will be held or construed to
create a contract of employment for a definite term or otherwise alter Executive’s status as an “at-will” employee, and Executive or the Board, the Company or the Employing Entity may terminate
Executive’s employment at any time and for any reason (or no reason), subject to the payment and notice obligations set forth in this Agreement and the provisions of this Agreement that expressly survive such termination. If requested by the
Board at any time or from time to time during the Employment Term, for no additional compensation. Executive will serve on the Board or on the board of directors, board of managers or equivalent governing body of the Company or any of its affiliates
and, if so requested by the Board will promptly resign therefrom. At the end of the Employment Term, Executive will offer to resign from all such positions. 

13. WAIVER OF JURY TRIAL. AS SPECIFICALLY BARGAINED FOR INDUCEMENT FOR EACH OF THE PARTIES HERETO TO ENTER INTO THIS AGREEMENT (AFTER
HAVING THE OPPORTUNITY TO CONSULT WITH COUNSEL), EACH PARTY HERETO EXPRESSLY WAIVES THE RIGHT TO TRIAL BY JURY IN ANY ACTION OR PROCEEDING RELATING TO OR ARISING IN ANY WAY FROM THIS AGREEMENT OR THE MATTERS CONTEMPLATED HEREBY. 

14. Corporate Opportunities. During the Employment Term, Executive shall submit to the Board all business, commercial and investment
opportunities or offers presented to Executive or of which Executive becomes aware that relate in whole or in part to any of the businesses, products or services of the Business (or to any business, product or service the Company or an affiliate is
in the process of developing) (“Corporate Opportunities”). Unless approved by the Board, Executive shall not, directly or indirectly, accept or pursue on Executive’s own behalf, or offer to any other person the opportunity to
accept or pursue, any Corporate Opportunities. 
 15. Miscellaneous Provisions. 

15.1 No Third-Party Beneficiaries. This Agreement will not confer any rights or remedies upon any person other than the Company and its
affiliates and Executive. 

  
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 15.2 Successors; Binding Agreement. This Agreement shall be binding upon, inure to
the benefit of and be enforceable by the Company and its successors and assigns and Executive and Executive’s personal or legal representatives, executors, administrators, successors, heirs, distributees, devisees and legatees. Nothing in this
Agreement shall obligate the Company or any of its affiliates to enter into any definitive agreement with respect to the Merger or to consummate any transaction with respect thereto. 

15.3 Assignment. 
 (a)
Not by Executive. This Agreement is personal to Executive, and Executive may not assign or transfer any part of Executive’s rights or duties hereunder, or any compensation due to him hereunder, to any other person. Notwithstanding the
foregoing, this Agreement shall inure to the benefit of and be enforceable by Executive’s personal or legal representatives, executors, administrators and heirs. 

(b) By the Company. This Agreement shall be assignable and transferable by the Company, at any time, to any successor or any parent,
subsidiary or other affiliate of the Company without the consent of Executive. The failure of an acquirer to assume this Agreement (as is, with reasonable adjustments for the change in entities) in connection with a Change in Control shall be deemed
to be a material breach of this Agreement. 
 15.4 Notices. All notice and other communications required or permitted under this
Agreement shall be in writing and shall be deemed to have been duly given when personally delivered, five days after deposit in the United States mail, postage prepaid, or one day after deposit for next day delivery with a nationally recognized
overnight courier, addressed (a) if to Executive, to his address as it appears in the records of the Company or [ENTITY], and if to the Company or the Employing Entity to both (i) [COMPANY CONTACT INFORMATION], Attention: General Counsel and
(ii) [EMPLOYING ENTITY CONTACT INFORMATION], Attention: General Counsel, or (b) to such other address as either party shall have furnished to the other in writing in accordance herewith, except that notices of change of address shall be
effective only upon receipt. 
 15.5 Governing Law: Arbitration. All issues and questions concerning the construction, validity,
enforcement and interpretation of this Agreement shall be governed by, and construed in accordance with, the laws of the State of Texas, without giving effect to any choice of law or conflict of law rules or provisions (whether of the State of Texas
or any other jurisdiction) that would cause the application of the laws of any jurisdiction other than the State of Texas. The parties agree that (except as set forth below in this Section 15.5) any dispute or controversy arising out of or
relating to this Agreement, the interpretation hereof or the relationship of the parties hereunder will be settled by arbitration before a single arbitrator to be held in the City of Dallas in the State of Texas in accordance with the Commercial
Arbitration Rules then in effect of the American Arbitration Association; provided, however, that the arbitrator will be knowledgeable in industry standards and practices, the power of the arbitrator will be limited to interpreting this Agreement as
written, the arbitrator’s monetary award (if any) will be within the ranges proposed in good faith by the parties to such arbitration, and the arbitrator will state in writing the reasons for his or his award and the legal and factual
conclusions underlying the award. The award of the arbitrator will be final, and judgment upon 

  
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the award may be confirmed and entered in any court, state or federal, having jurisdiction. Unless the arbitration award otherwise provides, the Company and Executive will each bear (i) its
own expenses in connection with such arbitration and (ii) one-half of the fees and expenses of the American Arbitration Association and the arbitrator. Each party hereto agrees that it waives any
objection, and specifically consents to, venue in the federal or state courts located in the State of Texas so that any action at law or in equity may be brought to enforce an arbitration award or in equity to seek equitable relief provided for in
Section 15.8. 
 15.6 Presumption/Construction. This Agreement or any section or provision of this Agreement will not be
construed against any party due to the fact that such Agreement or section was drafted by such party. The language used in this Agreement shall be deemed to be the language chosen by the parties hereto to express their mutual intent and no rule of
strict construction shall be applied against any party. 
 15.7 Miscellaneous. As used herein, unless the contest otherwise requires,
(i) the term “person” means a natural person, partnership (whether general or limited), limited liability company, trust, estate, association, corporation, custodian, nominee or any other individual or entity in its own or any
representative capacity; (ii) the terms “herein,” “hereof” and “hereunder” and words of similar import refer to this Agreement as a whole and not to any particular provision hereof; (iii) the terms
“include,” “includes” and “including” are deemed to be followed by the words “without limitation,” and any list of examples following such terms shall in no way restrict or limit the generality of the word or
provision with respect to which such examples are provided; (iv) the terms “shall” and “will” are used interchangeably throughout this Agreement, and the use of either connotes a mandatory requirement; (v) the term
“or” is not meant to be exclusive, and shall be interpreted as “and/or”; and (vi) the section headings set forth in this Agreement are for the convenience of the parties and in no way alter, modify, amend, limit or restrict
the contractual obligations of the parties. 
 15.8 Injunctive Relief. Executive acknowledges that the covenants contained in this
Agreement are reasonable in scope and duration, do not unduly restrict Executive’s ability to engage in his livelihood, and are necessary to protect the Company’s and the Business’s legitimate business interest from irreparable harm.
Executive further acknowledges that breach of any of the covenants contained in Sections 6, 7, 8, 9, 10 or 14 of this Agreement by Executive could result in irreparable harm to the Employing Entity or the Company and that money damages could be
inadequate. Therefore, in addition to any other remedy at law or equity available to the Employing Entity or the Company, Executive acknowledges that the Employing Entity and the Company shall be entitled to seek injunctive relief, including
specific performance, from a court of competent jurisdiction without the requirement to post a bond or other security or to actual damages, in the event of any actual or threatened breach or continued breach of any of the covenants identified above.

 15.9 Extension of Time Period. Executive acknowledges and agrees that any violation by Executive of any covenant contained in
Section 9 of this Agreement shall automatically toll and suspend the running of the applicable time period for that covenant for the period of time that the violation continues. Any such covenant shall remain in full force and effect and shall
bind Executive throughout the period of any such tolling and suspension. The running of the applicable time period for any such covenant shall recommence upon the conclusion of the violation of such covenant. 

  
 13 

 15.10 Executive’s Cooperation. During the Employment Term and indefinitely
thereafter, Executive shall cooperate with the Company in any internal investigation or administrative, regulatory or judicial proceeding as reasonably requested by the Company (including, without limitation, Executive being available to the Company
upon reasonable notice for interviews and factual investigations, appearing at the Company’s request to give testimony without requiring service of a subpoena or other legal process, volunteering to the Company all pertinent information and
turning over to the Company all relevant documents which are or may come into Executive’s possession). 
 15.11 Amendments. This
Agreement may not be changed, waived, discharged or terminated orally, but only by an instrument in writing, signed by the party against which enforcement of such change, waiver, discharge or termination is sought. 

15.12 Waiver. A party may extend the time for or waive the performance of any obligation of the other, waive any inaccuracies in the
representations or warranties by the other, or waive compliance by the other with any of the covenants or conditions of this Agreement. Any such extension or waiver shall be in writing and signed by the parties. No such waiver shall operate or be
construed as a waiver of any other or subsequent act or omission. 
 15.13 Executive’s Representations. Executive hereby
represents and warrants that (i) the execution, delivery and performance of this Agreement by Executive are not restricted, limited or otherwise inhibited by, and do not and will not, with or without notice or lapse of time or both, conflict
with breach, violate or cause a default under, any contract, agreement, duty, obligation, instrument, order, judgment or decree to which Executive is a party or by which Executive is bound, (ii) Executive will not, in the course of
Executive’s employment with the Employing Entity, use or disclose any confidential or proprietary information of any former employer or other person for whom Executive performed services of any kind, (iii) Executive is not a party to or
bound by any employment agreement or noncompetition agreement with any other person, or any confidentiality agreement with any other person which confidentiality agreement would reasonably be expected to restrict, inhibit or prevent Executive’s
performance hereunder, and (iv) upon the execution and delivery of this Agreement by the Company, this Agreement will be the valid and binding obligation of Executive, enforceable in accordance with its terms. Executive further acknowledges and
represents that Executive has consulted with independent legal counsel regarding Executive’s rights and obligations under this Agreement and that Executive fully understands the terms and conditions contained in this Agreement. 

15.14 Sect ion 409A. 

(a) General Compliance. This Agreement is intended to comply with Section 409A of the Code and the regulations and guidance
thereunder (“Section 409A”) or an exemption therefrom and shall be construed and administered in accordance with this intent. Notwithstanding any other provision of this Agreement, payments provided under this
Agreement may only be made upon an event and in a manner that complies with Section 409A 

  
 14 

 
or an applicable exemption. Any payments under this Agreement that may be excluded from Section 409A either as separation pay due to an involuntary separation from service or as a short term
deferral shall be excluded from Section 409A to the maximum extent possible. For purposes of Section 409A, each installment payment provided under this Agreement shall be treated as a separate payment. Any payments to be made under this
Agreement upon a termination of employment shall only be made upon a “separation from service” under Section 409A. Notwithstanding the foregoing, the Company makes no representations that the payments and benefits provided under this
Agreement comply with Section 409A and in no event shall the Employing Entity be liable for all or any portion of any taxes, penalties, interest or other expenses that may be incurred by Executive on account of
non-compliance with Section 409 A. 
 (b) Specified Employees. Notwithstanding any other
provision of this Agreement, if any payment or benefit provided to Executive in connection with his termination of employment is determined to constitute “nonqualified deferred compensation” within the meaning of Section 409A and
Executive is determined to be a “specified employee” as defined in Section 409A(a)(2)(b)(i) who is subject to a six-month delay in payment, then such payment or benefit shall not be paid until
the first payroll date to occur following the six-month anniversary of the termination date or, if earlier, on Executive’s death. 

(c) Reimbursements. Notwithstanding to the contrary in this Agreement or the Employing Entity policy with respect to such payments, in
kind benefits and reimbursements provided under this Agreement during any tax year of Executive shall not affect in kind benefits or reimbursements to be provided in any other tax year of Executive and are not subject to liquidation or exchange for
another benefit. Notwithstanding anything to the contrary in this Agreement, reimbursement be timely submitted by Executive and, if timely submitted, reimbursement payment shall be made to Executive in accordance with the Employing Entity’s
policies regarding reimbursements, but in no event later than the last day of the taxable year following the taxable year in which the expense was incurred. This Section 5.14(c) shall only apply to in kind benefits and reimbursements that would
result in taxable compensation income to Executive. 
 15.15 Section 280G. In the event that the compensation and other benefits
provided for in this Agreement or otherwise payable to Executive (i) constitute “parachute payments” within the meaning of Section 280G of the Code and (ii) but for this Section 15.15, would be subject to the excise tax
imposed by Section 4999 of the Cede or would be non deductible under Section 280G of the Code, then such pay and benefits will be either: 

(a) delivered in full, or 
 (b)
delivered as to such lesser extent which would result in no portion of such compensation and other benefits being nondeductible under Section 280G of the Code or subject to excise tax under Section 4999, of the Code, whichever of the
foregoing amounts, taking into account the applicable federal, state and local income taxes and the excise tax imposed by Section 4999, results in the receipt by Executive on an after-tax basis, of the
greatest amount of compensation and benefits, notwithstanding that all or some portion of such compensation and benefits may be taxable under Section 4999 of the Code. If a reduction is required pursuant to the preceding sentence, the reduction
shall occur in the manner (the “Reduction Method”) that 

  
 15 

 
results in the greatest economic benefit for Executive. If more than one method of reduction will result in the same economic benefit, the items so reduced will be reduced pro rata (the
“Pro Rata Reduction Method”). Notwithstanding the foregoing, if the Reduction Method or the Pro Rata Reduction Method would result in any portion of the payments being subject to taxes pursuant to Section 409A of the Code that
would not otherwise be subject to taxes pursuant to Section 409A of the Code, then the Reduction Method and/or die Pro Rata Reduction Method, as the case may be, shall he modified so as to avoid the imposition of taxes pursuant to
Section 409A of the Code as follows: (A) as a first priority, the modification shall preserve to the greatest extent possible, the greatest economic benefit for Executive as determined on an
after-tax basis; (B) as a second priority, the payments that are contingent on future events (e.g., being terminated without Cause), shall be reduced (or eliminated) before the payments that are not
contingent on future events: and (C) as a third priority, the payments that are “deferred compensation” within the meaning of Section 409A of the Code shall be reduced (or eliminated) before the Contingent Payments that are not
deferred compensation within the meaning of Section 409A of the Code. Unless the Company and Executive otherwise agree in writing, any extermination required under this Section will be made in writing by accountants designated by the Company
immediately prior to Change in Control (the “Accountants”), whose determination will be conclusive and binding upon Executive and the Company for all purposes for purposes of making the calculations required by this Section, the
Accountants may make reasonable assumptions and approximations concerning applicable taxes and may rely on reasonable, good faith interpretations concerning the application of Sections 280G and 4999 of the Code. The Company and Executive will
furnish to the Accountants such information and documents as the Accountants may reasonably request in order to make a determination under this Section. The Company will bear all costs the Accountants may reasonably incur in connection with any
calculations contemplated by this Section 15.15. 
 The Company shall make reasonable efforts to procure a vote under the Code
Section 280G regulations rendering Code Section 280G inapplicable to payments to Executive. 
 15.16 United States Federal and
State Withholding Taxes. The Employing Entity shall deduct the amount of all required United Slates federal and state and any other withholding taxes to be deducted from any amounts payable to Executive pursuant to this Agreement in accordance
with Executive’s Form W-4 on file with the Employing Entity and all applicable employment taxes. 

15.17 Severability. If any provision, portion or clause of this Agreement as applied in whole or in part to any circumstances is ruled
by an arbitrator or court of competent jurisdiction to be invalid or unenforceable, then the ruling shall not affect any other provision, portion or clause of this Agreement, the application of such provision, portion or clause in any other
circumstances or jurisdiction, or the validity or enforceability of this Agreement as a whole or any other provision, portion or clause hereof. 

15.18 Entire Agreement. This Agreement contains the entire agreement of the parties with respect to Executive’s employment and his
and the Employing Entity’s undertakings as contemplated by this Agreement, and supersedes all prior understandings and agreements of the parties and their affiliates, whether written or oral, with respect to the subject matter of this Agreement
(including, without limitation, the Prior Employment Agreement). 

  
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 15.19 Confidentiality of Agreement. This Agreement and its terms shall be kept
confidential by Executive, except that Executive may disclose the terms of this Agreement on a confidential basis to Executive’s attorneys and accountants and to Executive’s family. 

15.20 Execution in Counterparts. This Agreement may be executed in counterparts, each of which shall be deemed an original and all of
which, together, shall constitute a single instrument. Any counterpart signed or delivered by electronic means intended to preserve the original graphic and pictorial appearance of a document, or by any combination of such means, shall constitute
effective execution and delivery thereof. 
 [Signature Page follows] 

  
 17 

 IN WITNESS WHEREOF, each of the Company and Executive has executed this Agreement as
of the date first above written. 
  

			
	SIERRA PRIVATE INVESTMENTS, L.P.
		
	By:	 	 /s/ Peter Berger

	Name:	 	Peter Berger
	Title:	 	Director

  

	
	ACKNOWLEDGED AND AGREED:
	
	PARDEEP KOHLI
	
	 /s/ PARDEEP KOHLI

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