AT&T sim card AT&T phone asking me for code

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AT&T sim card AT&T phone asking me for code

I put an AT&T sim card into an AT&T locked phone and its asking me for the sim unlock code? has this happened to anyone else before? This is after I have activated a line on my phone.

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Re: AT&T sim card AT&T phone asking me for code

That shouldn't be happening. Try a different ATT SIM and if it works then you just need a new SIM. If a different SIM also doesn't work then the phone is the problem.
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