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Do you need a different SIM Card to unlock your phone?
I have my code to unlock my phone (Infuse 4G), and instructions from ATT Customer Care said that I will need to insert a different carrier SIM Card so that the unlock screen comes up to enter the code.
Well, I don't have another carrier SIM Card, and want to unlock the phone so that I can sell it for anyone to use on any carrier.
Is there another way to unlock with out using the non-ATT SIM Card?