Nokia 6800 Registration Failed

[joncav2222]

yeah i gota nokia 6800 and i entered the correct unlock code and its said phone unlocked, and now when i turn my phone on its says registration failed does any1 know how to get this off or undo what i did??
-Thanx in advance...

If you need heres the info
Nokia 6800
IMEI 01017500/105655/3
AT&T Wireless U.S.A

[phantom2002]

providing your sim card is working, your phones probably barred (i.e stolen)

Regards