<PAGE>

                                                                    EXHIBIT 10.5

                        AMENDMENT AGREEMENT dated as of August 2, 2005 (this
                  "Amendment"), in respect of the Amended and Restated Credit
                  Agreement dated as of December 29, 2004, as amended and
                  restated as of February 16, 2005, as amended and restated as
                  of February 16, 2005, as amended by the Waiver and Amendment
                  (the "Waiver and Amendment") dated as of June 30, 2005 (as
                  amended, supplemented or otherwise modified from time to time,
                  the "Credit Agreement"), among Symbol Technologies, Inc.
                  ("Symbol"), the lenders from time to time party thereto (the
                  "Lenders") and JPMorgan Chase Bank, N.A., as Administrative
                  Agent.

            The Borrower has requested that the Credit Agreement be amended as
set forth herein.

            In consideration of the premises and the agreements, provisions and
covenants herein contained, the parties hereto hereby agree as follows:

            SECTION 1. Amendment. Upon the effectiveness of this Amendment as
provided in Section 3 below:

            (a) The definition of "Fixed Charge Coverage Ratio" in Section 1.01
of the Credit Agreement is amended to read in its entirely as follows:

                  "Fixed Charge Coverage Ratio" means, for any period, the ratio
      of (a) the Consolidated EB1TDA for such period plus up to a cumulative
      aggregate amount of $55,000,000 of cash charges and non-cash charges
      representing accruals of or reserves for cash expenditures in future
      periods that, in each case, are recorded in one of the last three fiscal
      quarters of the fiscal year ending December 31, 2005 and that relate to
      the Borrower's restructuring plan announced June 28, 2005, minus the
      amount of Capital Expenditures of the Borrower and the consolidated
      Subsidiaries for such period to (b) the sum for such period of (i)
      Consolidated Interest Expense, (ii) Capital Lease Principal Payments and
      amortization payments with respect to Long-Term Indebtedness and (iii) the
      aggregate amount of Taxes paid in cash by the Borrower and its
      Subsidiaries.

            SECTION 2. Representations and Warranties. The Borrower represents
and warrants as of the Amendment Effective Date (defined below) to the Lenders
that:

            (a) Before and after giving effect to this Amendment, all
      representations and warranties of each Loan Party set forth in the Loan
      Documents (as amended hereby) are true and correct in all material
      respects except to the extent that any representation or warranty
      expressly relates to an earlier date (in which case such representation or
      warranty is correct as of such earlier date).

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                                                                               2

            (b) Immediately before and after giving effect to this Amendment, no
      Default has occurred and is continuing.

            SECTION 3. Conditions to Effectiveness. This Amendment shall become
effective on the date (the "Amendment Effective Date") on which the
Administrative Agent shall have received counterparts hereof duly executed and
delivered by the Borrower, the Administrative Agent and the Required Lenders.
The Administrative Agent shall notify the Borrower and the Lenders of the
Amendment Effective Date, and such notice shall be conclusive and binding.

            SECTION 4. Agreements. (a) Except as specifically stated herein, the
provisions of the Credit Agreement are and shall remain in full force and
effect. As used therein, the terms "Credit Agreement", "herein", "hereunder",
"hereinafter", "hereto", "hereof" and words of similar import shall, unless the
context otherwise requires, refer to the Credit Agreement, as amended hereby.

            (b) Except as expressly set forth herein, this Amendment shall not
by implication or otherwise limit, impair, constitute a waiver of, or otherwise
affect the rights and remedies of the Lenders or the Administrative Agent under,
the Credit Agreement or any other Loan Document, and shall not alter, modify,
amend or in any way affect any of the terms, conditions, obligations, covenants
or agreements contained in the Credit Agreement or any other Loan Document, all
of which are ratified and affirmed in all respects and shall continue in full
force and effect. Nothing herein shall be deemed to entitle the Borrower or any
Guarantors to a consent to, or a waiver, amendment, modification or other change
of, any of the terms, conditions, obligations, covenants or agreements contained
in the Credit Agreement or any other Loan Document in similar or different
circumstances. This Amendment shall constitute a "Loan Document" for all
purposes of the Credit Agreement and the other Loan Documents.

            SECTION 5. APPLICABLE LAW. THIS AMENDMENT SHALL BE GOVERNED BY, AND
CONSTRUED IN ACCORDANCE WITH, THE LAWS OF THE STATE OF NEW YORK.

            SECTION 6. Counterparts. This Amendment may be executed in two or
more counterparts, each of which shall constitute an original but all of which
when taken together shall constitute but one contract. Delivery of an executed
counterpart of a signature page of this Amendment by telecopy shall be effective
as delivery of a manually executed counterpart of this Amendment.

            SECTION 7. Expenses. The Borrower agrees to reimburse the
Administrative Agent for all reasonable out-of-pocket expenses incurred by it in
connection with this Amendment, including the reasonable fees, charges and
disbursements of Cravath, Swaine & Moore LLP, counsel for the Administrative
Agent.

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                                                                               3

            SECTION 8. Headings. The headings of this Amendment arc for purposes
of reference only and shall not limit or otherwise affect the meaning hereof.

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                                                                               4

            IN WITNESS WHEREOF, the parties hereto have caused this Amendment to
be duly executed by their respective authorized officers as of the day and year
first above written.

                                  SYMBOL TECHNOLOGIES, INC.,

                                    by /s/ James Porretto
                                       --------------------------
                                       Name:  James Porretto
                                       Title: Vice President Tax and Treasurer

                                  JPMORGAN CHASE BANK, N.A.,
                                  individually and AS Administrative Agent,

                                    by
                                       ___________________________
                                       Name:
                                       Title:

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                                                                               5

            IN WITNESS WHEREOF, the parties hereto have caused this Amendment to
be duly executed by their respective authorized officers as of the day and year
first above written.

                                  SYMBOL TECHNOLOGIES, INC.,

                                    by
                                       ___________________________
                                       Name:
                                       Title:

                                  JPMORGAN CHASE BANK, N.A.,
                                  individually and as Administrative Agent,

                                    by /s/ David F. Gibbs
                                       ---------------------------
                                       Name:  DAVID F. GIBBS
                                       Title: SENIOR VICE PRESIDENT

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                                                                               6

                                  SIGNATURE PAGE to the AMENDMENT AGREEMENT
                                  dated as of August 2, 2005, in respect of the
                                  AMENDED AND RESTATED CREDIT AGREEMENT dated as
                                  of December 29, 2004, as amended and restated
                                  as of February 16, 2005.

                                  To approve the amendment"

                                  Lender: Bank Leumi USA

                                          By: /s/ Scott Winfoot
                                              ----------------------------------
                                              Name:  Scott Winfoot
                                              Title: Vice President

                                  Lender: Bank Leumi USA

                                          By: /s/ Paul Tine
                                              --------------------------
                                              Name:  Paul Tine
                                              Title: First Vice President

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                                                                               7

                                  SIGNATURE PAGE to the AMENDMENT AGREEMENT
                                  dated as of August 2, 2005, in respect of the
                                  AMENDED AND RESTATED CREDIT AGREEMENT dated as
                                  of December 29, 2004, as amended and restated
                                  as of February 16, 2005.

                                  To approve the amendment"

                                  Lender: Bank of America

                                          By: /s/ Debra E. Delvecchio
                                              ----------------------------------
                                              Name:  Debra E. Delvecchio
                                              Title: Managing Director

                                  Lender: ______________________________________

                                          By: __________________________________
                                              Name:
                                              Title:

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                                                                               8

                                  SIGNATURE PAGE to the AMENDMENT AGREEMENT
                                  dated as of August 2, 2005, in respect of the
                                  AMENDED AND RESTATED CREDIT AGREEMENT dated as
                                  of December 29, 2004, as amended and restated
                                  as of February 16, 2005.

                                  To approve the amendment"

                                  Lender: BARCLAYS BANK PLC

                                          By: /s/ David Barton
                                              ----------------------------------
                                              Name:  DAVID BARTON
                                              Title: Associate Director

                                  Lender: ______________________________________

                                          By: __________________________________
                                              Name:
                                              Title:

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                                                                               9

                                  SIGNATURE PAGE to the AMENDMENT AGREEMENT
                                  dated as of August 2, 2005, in respect of the
                                  AMENDED AND RESTATED CREDIT AGREEMENT dated as
                                  of December 29, 2004, as amended and restated
                                  as of February 16, 2005.

                                  To approve the amendment"

                                  Lender: Citibank, N.A.

                                          By: /s/ Stuart N. Berman
                                              ----------------------------------
                                              Name:  Stuart N. Berman
                                              Title: Vice President

                                  Lender: ______________________________________

                                          By: __________________________________
                                              Name:
                                              Title:

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                                                                              10

                                  SIGNATURE PAGE to the AMENDMENT AGREEMENT
                                  dated as of August 2, 2005, in respect of the
                                  AMENDED AND RESTATED CREDIT AGREEMENT dated as
                                  of December 29, 2004, as amended and restated
                                  as of February 16, 2005.

                                  To approve the amendment"

                                  Lender: HSBC Bank USA, National Association

                                          By: /s/ Christopher J. Mendelsohn
                                              ----------------------------------
                                              Name:  Christopher J. Mendelsohn
                                              Title: First Vice President

                                  Lender: ______________________________________

                                          By: __________________________________
                                              Name:
                                              Title:

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                                                                              11

                                  SIGNATURE PAGE to the AMENDMENT AGREEMENT
                                  dated as of August 2, 2005, in respect of the
                                  AMENDED AND RESTATED CREDIT AGREEMENT dated as
                                  of December 29, 2004, as amended and restated
                                  as of February 16, 2005.

                                  To approve the amendment"

                                  Lender: JPMorgan Chase Bank, N.A.

                                          BY: /s/ David Gibbs
                                              ----------------------------------
                                              Name:  David Gibbs
                                              Title: Senior vice President

                                  Lender: ______________________________________

                                          By: __________________________________
                                              Name:
                                              Title:

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                                                                              12

                                  SIGNATURE PAGE to the AMENDMENT AGREEMENT
                                  dated as of August 2, 2005, in respect of the
                                  AMENDED AND RESTATED CREDIT AGREEMENT dated as
                                  of December 29, 2004, as amended and restated
                                  as of February 16, 2005.

                                  To approve the amendment"

                                  Lender: KeyBank National Association

                                          By: /s/ Jeff Kalinowski
                                              ----------------------------------
                                              Name:  Jeff Kalinowski
                                              Title: Senior Vice President

                                  Lender: ______________________________________

                                          By: __________________________________
                                              Name:
                                              Title:

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                                                                              13

                                  SIGNATURE PAGE to the AMENDMENT AGREEMENT
                                  dated as of August 2, 2005, in respect of the
                                  AMENDED AND RESTATED CREDIT AGREEMENT dated as
                                  of December 29, 2004, as amended and restated
                                  as of February 16, 2005.

                                  To approve the amendment"

                                  Lender: NORTH FORK BANK

                                          By: /s/ Enrilo Panno
                                              ----------------------------------
                                              Name:  ENRILO PANNO
                                              Title: VICE PRESIDENT

                                  Lender: ______________________________________

                                          By: __________________________________
                                              Name:
                                              Title:

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                                                                              14

                                  SIGNATURE PAGE to the AMENDMENT AGREEMENT
                                  dated as of August 2, 2005, in respect of the
                                  AMENDED AND RESTATED CREDIT AGREEMENT dated as
                                  of December 29, 2004, as amended and restated
                                  as of February 16, 2005.

                                  To approve the amendment"

                                  Lender: WACHOVIA BANK, NA

                                          By: /s/ C. Jeffrey Seaton
                                              ----------------------------------
                                              Name:  C. JEFFREY SEATON
                                              Title: Managing Director

                                  Lender: ______________________________________

                                          By: __________________________________
                                              Name:
                                              Title: