Document:

<PAGE>

                                                                    EXHIBIT 4.11

                               DATED: 28 JUNE 2003

                        J.I.C TECHNOLOGY COMPANY LIMITED
                                   the Vendor

                                  in favour of

                         GLORY GATE ENTERPRISES LIMITED
                                  the Purchaser

                                DEED OF INDEMNITY

                             PRESTON | GATES | ELLIS
                                   SOLICITORS
                              [Chinese Character]

                          10th Floor, Hutchison House,
                                10 Harcourt Road,
                               Central, Hong Kong.

                   Tel: (852) 2230 3500  Fax: (852) 2899 2996
                          Website: www.prestongates.com
                          Our Ref: 49079-00001/NKA/MHCW

<PAGE>

                                    CONTENTS

<TABLE>
<CAPTION>
CLAUSE   HEADING                                                  PAGE
<S>      <C>                                                      <C>
1.       INTERPRETATION................................             1

2.       INDEMNITY.....................................             2

3.       EXEMPTIONS....................................             3

4.       SET OFF.......................................             3

5.       NOTICE........................................             3

6.       GOVERNING LAW AND JURISDICTION................             3

EXECUTION..............................................             5
</TABLE>
<PAGE>

THIS DEED is made the 28th day of June 2003.

BY:

J.I.C. TECHNOLOGY COMPANY LIMITED, a company incorporated in the Cayman Islands
and having its registered office at Century Yard, Cricket Square, Hutchins
Drive, P.O. Box 2681GT, George Town, Grand Cayman, the Cayman Islands and having
its principle office in Hong Kong at 15th Floor, China Merchants Tower, Shun Tak
Centre, Nos. 168-200 Connaught Road Central, Hong Kong (the "VENDOR")

IN FAVOUR OF:

GLORY GATE ENTERPRISES LIMITED, a company incorporated in the British Virgin
Islands having its registered office at Offshore Incorporation Centre, P.O. Box
957, Road Town, Tortola, the British Virgin Islands (for itself and as trustee
for CHINA AMPLE TECHNOLOGY LIMITED (the "COMPANY") and Jieyao Electronics
(Shenzhen) Company Limited ("JIEYAO ELECTRONICS")) (the "PURCHASER")

WHEREAS

This Deed is entered into accordance with an agreement between the Vendor and
the Purchaser dated 28th June 2003 relating to the sale and purchase of shares
in the Company (the "AGREEMENT").

NOW THIS DEED WITNESSES as follows:

1.       INTERPRETATION

         In this Deed:

1.1      Words and expressions defined in the Agreement shall, except as
         otherwise provided or expressly defined, have the same meaning;

1.2      "CLAIM" includes any assessment notice demand or other document issued
         or action taken by or on behalf of any authority or body whatsoever and
         of whatever country, from which it appears that the Company or Jieyao
         Electronics is liable or is sought to be made liable to make any
         payment or is deprived or is sought to be deprived of any relief or
         allowance or credit or right to repayment of taxation;

1.3      "TAXATION" means all forms of taxation levied in Hong Kong, PRC or
         elsewhere and includes, but without limitation, all forms of profits
         tax, property tax, first registration tax, estate duty and stamp duty
         whatsoever charged or imposed by the Government' of Hong Kong,
         Government of the PRC or any other government wherever located;

1.4      "EVENT" includes (without limitation) any omission or transaction
         whether or not the Company is a party thereto and includes completion
         of the sale of shares of the

                                       1
<PAGE>

        Company to the Purchaser and references to the result of events on or
        before the date hereof shall include the combined result of two or more
        events one or more of which shall have taken place before the date
        hereof;

1.5     Reference to income or profits or gains earned accrued or received
        shall include income or profits or gains deemed to have been or treated
        as or regarded as earned accrued or received for the purposes of any
        legislation;

1.6     Reference to any claim for taxation shall include any claim whether
        made before or after the date hereof and whether satisfied or
        unsatisfied at the date hereof and shall include:

        (a)      the loss of any relief grant allowances subsidy credit or
                 other preferential terms granted by or pursuant to any
                 legislation or otherwise for taxation purposes which would
                 (were it not for the claim in question) have been available to
                 the Company or Jieyao Electronics whether or not the said loss
                 results in any taxation being payable at the time of such
                 loss; and

        (b)      the nullifying or cancellation of a right to repayment of
                 taxation which would have been so available or is at the date
                 hereof assumed by the Vendor or the Purchaser to be available;

        and in such case the amount of the relief grant allowance subsidy
        credit or other preferential terms so lost or the amount of repayment
        which would otherwise have been obtained shall be treated as an amount
        of taxation for which a liability has arisen;

1.7     Reference to the result of events on or before the date hereof shall
        include the combined result of two or more events the first of which
        shall have taken place on or before the date hereof.

2.      INDEMNITY

        Subject as hereinafter provided, the Vendor hereby as separate
        undertakings undertakes and covenants to the Purchaser, (for itself and
        as trustee for the Company and Jieyao Electronics) to indemnify the
        Company and Jieyao Electronics and keep it and each of them indemnified
        against any claim for any taxation made against the Company or Jieyao
        Electronics either on or before or in respect of any period before the
        Jieyao Completion Date or in respect of any event on or before the
        Jieyao Completion Date whether alone or in conjunction with other
        circumstances and whether or not such taxation is also or alternatively
        chargeable against or attributable to any other person firm or company
        (and so that this indemnity shall cover all reasonable costs and
        expenses properly payable by the Company and Jieyao Electronics in
        connection with and for the purpose of contesting, negotiating,
         resisting, quantifying or disputing any claim).

                                       2
<PAGE>

3.       EXEMPTIONS

         The indemnity given by Clause 2 of this Deed does not cover any claim
         for taxation :

         (a)      to the extent that provision or "reserve in respect thereof
                  was made in the Accounts; or

         (b)      for which the Company or Jieyao Electronics is primarily
                  liable arising as a result of transactions in the routine
                  course of its business since the Accounts Date; or

         (c)      to the extent that such claim arises as a result only of any
                  provision or reserve in respect thereof being insufficient by
                  reason of any increase in rates of taxation made after the
                  date hereof with retrospective effect; or

         (d)      which would not have arisen except wholly as a result of a
                  voluntary act or transaction or series of transactions carried
                  out by the Purchaser (or persons deriving title from it) or
                  the Company or Jieyao Electronics concerned after the date
                  hereof otherwise than in the routine course of its business.

4.       SET OFF

         If any provision for taxation contained in the Accounts shall prove to
         be an over provision the amount of such over provision shall be set off
         against the liability (if any) of the Vendor under this Deed.

5.       NOTICE

         If the Purchaser shall become aware of a claim relevant for the
         purposes of this Deed it shall forthwith give written notice thereof to
         the Vendor at the address in Hong Kong given above (or such other
         address or addresses as they may from time to time notify in writing
         for the purposes of this Deed) and shall (if the Vendor shall indemnify
         and secure and keep indemnified and secured the Purchaser and the
         Company and Jieyao Electronics to the Purchaser reasonable satisfaction
         against any liability costs damages or expenses which may be incurred
         thereby) take such action and procure that the Company and Jieyao
         Electronics take such action as the Vendor may reasonably request it to
         avoid resist or comprise such claim.

6.       GOVERNING LAW AND JURISDICTION

         This Deed shall be governed and construed in accordance with the law
         for the time being in force in Hong Kong and the parties hereby submit
         to the non-exclusive jurisdiction of Courts of Hong Kong.

                                       3
<PAGE>

IN WITNESS whereof the parties have caused this Deed to be executed the day and
year first above written and in the Macau Special Administrative Region of the
People's Republic of China.

                                       4
<PAGE>

                                                                  [COMPANY SEAL]

EXECUTION

The Common Seal of                      )
J.I.C TECHNOLOGY COMPANY LIMITED        )
was hereto affixed in the presence of:  )

/s/ Li Shi Yuen, Joseph
/s/ Keo Ming Kown

                                       5<PAGE>
                                                                    EXHIBIT 4.12

                                                                     Page 1 of 5

                                                                  26th June 2003

                               AGREEMENT AMENDMENT

                                     BETWEEN

                     SONY ERICSSON MOBILE COMMUNICATIONS AB
                  (HEREINAFTER REFERRED TO AS "SONY ERICSSON")

                                       AND

                 NAM TAI ELECTRONIC & ELECTRICAL PRODUCTS Ltd.
                   (HEREINAFTER REFERRED TO AS THE "SUPPLIER")

                           REGARDING PROJECT "FILIP 2"

<PAGE>

                                                                     Page 2 of 5

                                                                  26th June 2003

TABLE OF CONTENTS

<TABLE>
<S>   <C>                                                               <C>
1.    TERMINOLOGY, INTEGRATED PART..................................    1
2.    SCOPE OF THE AGREMENT AMENDMENT ..............................    1
3.    PROJECT PLAN .................................................    2
4.    PRICES AND PRICE MODEL .......................................    2
5.    FORECAST FLEXIBILITY & LIABILITY .............................    2
6.    TERM OF AGREEMENT AND TERMINATION ............................    2
</TABLE>

ENCLOSURES;

Enclosure 3.1    Project Plan, 2/1202-FCP 101 2260 Rev C

Enclosure 4.1    Prices and Commercial Terms

<PAGE>

                                                                     Page 1 of 5

                                                                  26th June 2003

AGREEMENT AMENDMENT

made as of 10th May 2003, by and between

Sony Ericsson Mobile Communications AB, Org no 556615-6658, a limited liability
company duly incorporated and existing under the laws of Sweden, with its legal
address at Nya Vattentornet, S-221 88 Lund, Sweden, hereinafter referred to as
"Sony Ericsson",

and

NAM TAI ELECTRONIC & ELECTRICAL PRODUCTS Ltd, with organisation number 129666, a
corporation duly incorporated and existing under the laws of Hong Kong and
having its registered office at 15th Floor, China Merchants Tower, Shun Tak
Centre, 168-200 Connaught Road Central, Hong Kong (hereinafter referred to as
the "Supplier") (hereinafter referred to as the "Supplier").

WHEREAS:

1        Sony Ericsson and Supplier have entered into a Specific Service
         Agreement dated 20th March 2002, "SSA August CI" regarding the August
         CI Camera and a Specific Service Agreement, SSA Filip, dated 10th
         January 2003 regarding the Filip Camera.

2.       Sony Ericsson has issued a Letter of Confirmation dated 8th April 2003
         regarding the excessive components and WIP of the August CI Camera due
         the change in market conditions.

3.       Due to changes in the market conditions and reallocation of components
         and resources the Parties agree to change and amend the SSA Filip as
         stated herein in order to make use of excessive material from the
         August Camera

4.       The Supplier has explained that it is willing and fully able to perform
         the Product Supply on behalf of Sony Ericsson for delivery of high
         quality Products, under the terms and conditions set out in this
         Agreement Amendment and the GSPA

NOW THEREFORE, in consideration of the mutual obligations herein contained, the
Parties agree as follows:

1.       TERMINOLOGY, INTEGRATED PART

         This Agreement Amendment shall be an integrated part of the SSA Filip
         and, accordingly, all terms and conditions in the SSA Filip shall also
         apply to this Agreement Amendment. Capitalised terms contained herein
         shall have the meanings assigned to them below or as ascribed to them
         in the SSA unless otherwise defined in the context or document where it
         is used.

         "AGREEMENT AMENDMENT", means this agreement amendment.

2.       SCOPE OF THE AGREMENT AMENDMENT.

<PAGE>

                                                                     Page 2 of 5

                                                                  26th June 2003

2.1      This Agreement Amendment comprises all changes and amendments agreed in
         relation to SSA Filip, i.e. the Camera Filip and the reuse of excess
         components from the August Camera, (this new modified Filip is called
         Filip 2) as stated below

3.       PROJECT PLAN

3.1      Enclosure 2.3 of SSA Filip shall be replaced by a new Project plan,
         2/1202-FCP 101 2260 Rev C or later, as enclosed.

4.       PRICES AND PRICE MODEL

4.1      Enclosure 10.1 of SSA Filip shall be replaced by a new Enclosure Prices
         and Commercial Terms as enclosed.

5.       FORECAST FLEXIBILITY & LIABILITY

5.1      Enclosure 14.2 and 14.2a of SSA Filip shall be deleted.

5.2      No separate liability model is deemed necessary since almost all
         material is on stock or available within the agreed lead-times. If any
         long lead-time items will occur theses shall be handled on a case by
         case approach and subjected individual approval from SEMC

5.3      Both parties agree that the excessive material as defined in our letter
         of confirmation dated 24th April 2003 shall be reused in the production
         of Filip 2 cameras and delivered as agreed in separate material
         authorizations including any additional components required. Such
         material authorizations to be agreed prior to 30 November 2003 and any
         delivery schedule must end prior 28th February 2003. Purchase orders
         for such quantities shall be placed no later than 30th November 2003.
         Save for the aforesaid, the liabilities & obligation of Sony Ericsson
         under the Letter of Confirmation shall not be affected.

5.4

5.5      TERM OF AGREEMENT AND TERMINATION

5.6      This Agreement Amendment shall come into force upon its execution by
         duly authorised representatives of both Parties and shall remain in
         effect until three (3) months have passed following written notice of
         termination by either Party, unless terminated on an earlier date as
         set out in Section 29 "TERM OF AGREEMENT AND TERMINATION" in the GSPA.

<PAGE>

                                                                     Page 3 of 5

                                                                  26th June 2003

IN WITNESS WHEREOF, each of the parties hereto has caused this Agreement to be
executed, in duplicate, each party taking one copy.

Date: 26th June 2003                            Date: 26th June 2003
Place: Lund                                     Place: Lund

NAM TAI ELECTRONIC &                            SONY ERICSSON MOBILE
ELECTRICAL PRODUCTS Ltd                         COMMUNICATIONS AB

/s/ KARENE WONG                                 /s/ MATHS GYLLING
---------------                                 -----------------

KARENE WONG                                     MATHS GYLLING
<PAGE>

                                                 Company Internal           1(1)
[SONY ERICSSON LOGO]                             AGREEMENT
                                                 Document number     Revision
                                                  Uae                PA1
Prepared by                                      Date
Responsible Buyer                                2003-04-28
Contents responsible if other than preparer      Remarks

Approved by
Authorized Sourcing Manager

         PRICES AND COMMERCIAL TERMS.

         ABSTRACT

         This document includes prices and additional commercial terms agreed
         between Sony Ericsson and supplier with regard to the study/development
         work to be performed by supplier. The assignment is detailed in below
         listed document.

         Project:         Filip

         Project Plan:    2/1202-FCP 101 2260 Rev C

         Supplier:        NAM TAI ELECTRONIC & ELECTRICAL PRODUCTS Ltd.

         TABLE OF CONTENTS

<TABLE>
<S>                                                            <C>
TABLE OF CONTENTS ....................................         1
1        REVISION HISTORY ............................         1
2        TERMS OF PAYMENT ................. ..........         2
3        TERMS OF DELIVERY ................. .........         2
4        NON RECURRING ENGINEERING ...................         2
5        SONY ERICSSON TOOLS .........................         2
6        PROTOTYPES ..................................         2
7        PRODUCTS ....................................         3
</TABLE>

1        REVISION HISTORY

<TABLE>
<CAPTION>
        REV.                     DATE                        NOTE
--------------------------------------------------------------------------------
<S>                              <C>                         <C>

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------

--------------------------------------------------------------------------------
</TABLE>

<PAGE>

                                Company Internal                            2(2)
[SONY ERICSSON LOGO]            AGREEMENT
                                Document number                       Revision
                                 Uae                                  PA1

2        TERMS OF PAYMENT

         Payment terms is 30 days after performed delivery and receipt of
         invoice.

3        TERMS OF DELIVERY

         Term of delivery is FCA Hong Kong in accordance with INCO-terms 2000.

4        NON RECURRING ENGINEERING

4.1      NRE CHARGES

         NRE/Travelling 20.000 USD

4.2      PAYMENT PLAN

         NRE may be invoiced upon release of project for mass production.

5        SONY ERICSSON TOOLS

<TABLE>
<S>                                             <C>
Tooling                                         88 000,00 USD
-------------------------------------------------------------
Testing Jig & Fixture for production            10 000,00 USD
-------------------------------------------------------------
Equipment for Verification Test                 20 000,00 USD
-------------------------------------------------------------
</TABLE>

5.1      PAYMENT PLAN

         Tooling may be invoiced upon release of project for mass production.

6        PROTOTYPES

6.1      PROTOTYPE PRICE

<TABLE>
<CAPTION>
                            Pcs   Price/pcs      Total price
-------------------------------------------------------------
<S>                       <C>    <C>          <C>
Soft-Tool Sample            15       85,00        1275,00 USD
-------------------------------------------------------------
FP1                        320       23,00        7360,00 USD
-------------------------------------------------------------
FP1                        500       23,00       11500,00 USD
-------------------------------------------------------------
</TABLE>

6.2      PAYMENT PLAN

         Prototypes may be invoiced upon delivery.

7        LEADTIME

         Lead time for MCA-30 is 6 weeks. Any components that have longer lead
         time than 4 weeks will need a Material Authorization to secure material
         in time. Supplier is responsible for a due date for such Material
         Authorization in order to keep 6 weeks lead time.

<PAGE>

                                Company Internal                            3(3)
[SONY ERICSSON LOGO]            AGREEMENT
                                Document number                       Revision
                                 Uae                                  PA1

8        PRODUCTS

8.1      PRODUCT PRICES

         Price for Product in different variant as below

         SXK 1041043 (Camera Neck loop Manual, Warranty leaflet): 18,023 USD

         KRY 105191, Camera: 17,734 USD

         SXA 1093048, Neck loop: 0,12 USD

         (Camera, Neck loop): 17,854 USD

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