hi I have an att&t wirless 6200 mobile and it is not working for gsm network and I need to unlock it and when I enter the code to unlock it the phone says ( sim lock can't be ristrected) what can I do
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hi I have an att&t wirless 6200 mobile and it is not working for gsm network and I need to unlock it and when I enter the code to unlock it the phone says ( sim lock can't be ristrected) what can I do