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cingular sim card in tmobile phone..?

im selling my tmobile phone to someone with cingular..how do i unlock my phone so she can use it?

2 Answers

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  • Anonymous
    1 decade ago
    Favorite Answer

    Call your service provider

  • Anonymous
    1 decade ago

    you should just be able to put the cingular sim card in the tmobile phone.

    Source(s): i did it!
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