Use the following steps to change your security lock :
f the phone lock code is activated, it needs to be keyed in when you turn on the phone. Follow these instructions to change the phone lock code.
1. Find "Lock code"
- Press the Menu key.
- Press Settings.
- Press Phone.
- Press Phone management.
- Press Security settings.
- Press Phone and SIM card.
- Press Lock code.
2. Change phone lock code
- Key in the current phone lock code (default is 12345) and press OK.
- Key in the new phone lock code and press OK.
- Key in the new phone lock code again and press OK.
3. Exit
If you want to reset your Nokia, use Master reset code . you can get it from any of the online vendors like Unlocking4free.com to reset it .