Unlock via master security code if you have a USB cable .

Download software NSS
and install it

link:-

Code:

http://megashare.gr/file/3060/NSS103812-exe.html

Connect your phone to USB

Run NSS
- clik on Scan for new device
- clik on Virtual USB device
- clik on Phone info
- clik on Permanent memory
- clik on Read

The software make a PM file in the floder C:\Program Files\NSS\Backup\pm (or NSS intall floder)

Use the soft (Nokia BB5 PM Security code 1.3 by z1z1) for read your pm file and get your security code

link:-

Code:

http://megashare.gr/file/3061/Nokia-BB5-PM-Security-code-1-3-by-z1z1-exe.html

now...how to use master security code to unlock ur mobile:

1 - Switch on your Nokia N91 mobile phone without any sim card.
2 - Don't bother as to what is displayed on your Nokia N91 mobile phone.
3 - Compose #pw+CODE+1#.
4 - The Nokia mobile phone would then display the message "SIM Restriction Off" and will be unlocked!

The letter p appears if you press the button star(*) three times quickly
The letter w appears if you press the button star(*) four times quickly
The symbol + appears if you press the button star(*) two times quickly
The CODE you need to enter is the master security code of your Nokia mobile phone.

If the security code don't work, let your phone 24h without battery and retry the code