How to Unlock the Nokia Lumia 820

1.  Switch ON your Nokia Lumia 820 phone with a non-accepted SIM card.
2. Nokia Lumia 820 will ask you to Enter Unlock PIN.
3. Input the 8-digit Unlock Code.

If you see code like this 12345678901201928394/495839485940394839405 It's two different code(12345678901201928394 and 495839485940394839405), try them both but only one will work.

For Nokia Lumia 900 from AT&T USA, if code is NOT working:

The workaround is this: Enter the incorrect code until you run out of your ten (10) attempts. Then you'll get the *real* network unlock message, with 32 attempts. Enter the same 8-digit code you've been entering,

Watch: http://www.youtube.com/watch?v=8SO5ZXQy1zM

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