I've unlocked my Nokia 6600 (was locked to Orange network) and it seems to have worked as the phone said 'Sim Restriction off' after entering the code. However, when I switch on the phone with a T-Mobile SIM card in it, it starts up normally but then turns itself off again. Any ideas how to fix this?
Orange Nokia 6600 Unlock Problems
Did you try to flash your mobile for unlocking? It is the effect of flashing. you mobile is bricked. nothing can be done.