The xt912 will not work with her sim from the straight talk sim program that would be T-Mobile of AT&T this phone will not work with them because of the lock on our phones. To use straight talk on this phone u need St byop cdma program which does not give you a sim just uses the old 3g phones and u may have to do some cdma workshop changes like you have to do for page plus, hope this helps
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Android's I own, Droid Razr, HTC Incredible, Droid 2,
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Caleb T. Durant