FAQ > FAQ > Is there any way to make an AT&T sim card work in a T-Mobile phone?
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You will need to unlock the T-Mobile phone. You can buy a code on line for about ten dollars. However it will still be T-Mobile software (possible trouble with pic texting and internet) so best would be to trade it for an AT&T one.
Last updated on April 20, 2010 by GreenCells