EXHIBIT 10.5

EXECUTION COPY

AMENDMENT NO. 3 TO CREDIT AGREEMENT

AMENDMENT, dated as of April 9, 2007 (this “Amendment”), to the Credit
Agreement, dated as of November 7, 2006, as amended by Amendment to Credit
Agreement, dated as of February 6, 2007 and by Amendment No. 2 to Credit
Agreement, dated as of March 30, 2007 (the “Agreement”), among InPhonic, Inc., a
Delaware corporation (the “Borrower”), the Lenders listed on the signature pages
hereof as Lenders, and Citicorp North America, Inc., as Administrative Agent.

WHEREAS, the parties hereto have previously entered into the Agreement; and

WHEREAS, the parties have agreed to amend the Agreement pursuant to the terms
and conditions set forth herein.

NOW, THEREFORE, in consideration of the mutual agreements, provisions and
covenants contained herein, the parties agree as follows:

Section 1.    Definitions. Capitalized terms used but not otherwise defined
herein shall have the respective meanings given to them in the Agreement.

Section 2.    Effectiveness of the Amendment. This Amendment shall become
effective upon receipt by the Administrative Agent of (x) counterparts hereof
duly executed by: (i) the Borrower, (ii) each of the Guarantors, (iii) the
Administrative Agent, and (iv) each Lender, and (y) confirmation of the due
authorization of this Amendment by the Borrower and each Guarantor in form and
substance satisfactory to the Administrative Agent and the Lenders.

Section 3.    Amendment to Agreement – Post-Closing Covenants

Section 6.01(a). The phrase “within 100 days after the end of the fiscal year
ended December 31, 2006 and within 90 days after the end of each other fiscal
year” shall be replaced with the phrase: “by April 16, 2007 (or, if the Borrower
has timely paid the 2006 Financials Delay Fee, as defined in Section 4 of
Amendment No. 3 to Credit Agreement, by April 23, 2007) with respect to the
fiscal year ended December 31, 2006 and within 90 days after the end of each
other fiscal year.”

Section 4.    Amendment to Agreement – 2006 Financials Delay Fee

If the Borrower does not comply with the Sections 6.01(a), 6.02(a) and 6.02(b)
with respect to the fiscal year ended December 31, 2006 by April 16, 2007, the

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Borrower shall (on April 17, 2007) pay a fee of $100,000 (the “2006 Financials
Delay Fee”) to the Administrative Agent for the accounts of the Lenders (to be
distributed to the Lenders in proportion to each such Lender’s Applicable
Percentage in respect of the Facility). Such 2006 Financials Delay Fee is
non-refundable. The Borrower’s timely payment of the 2006 Financials Delay Fee
shall automatically modify the requirements of Section 6.01(a) as expressly set
forth in Section 3 of Amendment No. 3 to Credit Agreement, without the need for
any further action or consent by any Person. The Borrower’s payment, and the
Administrative Agent’s and the Lenders’ receipt, of such 2006 Financials Delay
Fee shall not waive any Default or Event of Default nor waive any rights or
remedies of the Administrative Agent or the Lenders under the Agreement as
hereby amended, the other Loan Documents or applicable law, all of which are
cumulative and expressly reserved.

Section 5.    Representations and Warranties. The Borrower hereby repeats and
restates those representations and warranties set forth in Article V of the
Agreement, as if made on and as of the date hereof (except to the extent such
representations and warranties expressly relate to an earlier date), which
representations and warranties are hereby incorporated herein by reference, as
if specifically set forth herein; provided that references to “the Agreement” in
any Loan Documents shall be and are deemed to mean the Agreement as amended
hereby. The Borrower hereby represents and warrants that, after giving effect to
this Amendment, no Default or Event of Default exists on the date of this
Amendment.

Section 6.    Consent of Guarantors. By signing below, each of the Guarantors
irrevocably consents and agrees to this Amendment.

Section 7.    Miscellaneous. This Amendment may be executed by one or more of
the parties to this Amendment on any number of counterparts (including by
facsimile), and all of said counterparts taken together shall be deemed to
constitute one and the same instrument. This Amendment is a Loan Document. The
Borrower shall pay or reimburse each of the Lenders and the Administrative Agent
for all of their reasonable out-of-pocket expenses in connection with the
negotiation, preparation, execution and delivery of this Amendment, including
without limitation, the reasonable fees and expenses of Fried, Frank, Harris,
Shriver & Jacobson, LLP. The provisions of Sections 10.14 and 10.15 of the
Agreement are incorporated by reference into this Amendment mutatis mutandis.
This Amendment shall not constitute an amendment or waiver of any of the terms
and provisions of the Agreement and shall not be construed as a waiver or
consent to any further or future action on the part of the Borrower or any
Guarantor, except to the extent expressly set forth herein. Except as
specifically set forth herein, all of the terms and provisions of the Agreement
and the other Loan Documents are and shall remain in full force and effect and
the Borrower and the Guarantors shall continue to be bound by such terms and
provisions.

[Signature Pages Follow]

 

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IN WITNESS WHEREOF, each of the parties hereto has caused this Amendment to be
duly executed and delivered as of the date first above written.

 

Borrower: INPHONIC, INC. By:   /s/ David A. Steinberg  

Name: David A. Steinberg

Title: Chief Executive Officer

Guarantors: CAIS ACQUISITION, LLC By:   /s/ David A. Steinberg  

Name: David A. Steinberg

Title: President

CAIS ACQUISITION II, LLC By:   /s/ David A. Steinberg  

Name: David A. Steinberg

Title: President

FON ACQUISITION, LLC By:   /s/ David A. Steinberg  

Name: David A. Steinberg

Title: President

MOBILE TECHNOLOGY SERVICES, LLC By:   /s/ David A. Steinberg  

Name: David A. Steinberg

Title: President

 

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SIMIPC ACQUISITION CORP. By:   /s/ David A. Steinberg  

Name: David A. Steinberg

Title: Chief Executive Officer

STAR NUMBER, INC. By:   /s/ David A. Steinberg  

Name: David A. Steinberg

Title: Chief Executive Officer

1010 INTERACTIVE, LLC.

By:   /s/ David A. Steinberg  

Name: David A. Steinberg

Title: Chief Executive Officer

 

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CITICORP NORTH AMERICA, INC.,

    as Administrative Agent and as a Lender

By:   /s/ Scot P. French  

Name: Scot P. French

Title: Managing Director/Vice President

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GOLDMAN SACHS CREDIT PARTNERS,

    L.P.,

    as a Lender

By:   /s/ Kenneth Eberts  

Name: Kenneth Eberts

Title: Managing Director, Goldman, Sachs

& Co. – Attorney in fact, Goldman Sachs

Credit Partners

 

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AP INPHONIC HOLDINGS, LLC,

    as a Lender

By:   /s/ Scott G. Bruce  

Name: Scott G. Bruce

Title: Managing Director