Before using any calculator software, you need your device's IMEI: Open the dialer on your Type *#06# .

Once you have generated a code (usually in the format #pw+CODE+1# ), follow these steps: Turn on the phone without a SIM card inserted. On the home screen, type the code carefully. To get , press * three times quickly. To get w , press * four times quickly. To get + , press * two times quickly.

A 15-digit number will appear on the screen. Write this down carefully. Common Software and Methods

: This is one of the most well-known free tools for older Nokia models. While it supports many devices, users often find that newer BB5 SL3 (SIM Lock 3) versions of the C3 require more advanced server-based calculation.