Yes..You have to unlock your mobile before using it in other country..
If you have the code, you may follow the instructions at,
1 - Switch ON your Motorola C168i with a NOT ACCEPTED SIM Card,
2 - Phone will display "Enter Special Code",
3 - You can now enter the Unlock Code.
NOT ACCEPTED: We mean, to use a sim card from a network other than the network your Motorola C168i is locked to.
WARNING: If one of theses messages appear :
- "Contact Service Provider"
- "Tampert Alter"
- "Wait before enter special Code"
- "Contact Service'
It's because you or somebody already entered too many wrong codes, you just have to leave the Motorola C168i ON with the errors message and after 40 minutes to 2 hours the message "Enter Code Special" will appear again!
If you have doubt in this, check the instructions at Wickedunlock.com/motorola-c168i/rs11wp9/ ..