please help me unlock this nokia 6800a

[kusumkumar]

hello ,
i have a nokia 6800a from AT & T USA.i tried to open the sim lock ,it says it is open and does not say invalid sim ,but it does not show the notwork signal,it does not work..and there is no signal bar on the screen.i want to use it in germany o2 network.

please help me

model: nokia 6800a
type: NSB-9
IMEI : 01017500/099010/9
CODE : 0509694FK14

[Atter]

Your phone is unlocked successfully!

Maybe your phone is blocked, or your SIM is too old...