Forgot my lock code and i am litreally lost ...pls help me sum1.!!

Plz plz help me my i have forgot my mobile lock code of nokia 6120 classic hows
IMEI:359850010202302 i will very thank full to u plz

The Mastercode:
This is the code needed to reset the Security code, nothing else, and it's for your phone only. You type in security codes (any) until the phone request the Mastercode, when it does, leave your phone still, don't use it for 15 minutes, then type in the Master code.

SIM pin code:
This is a pin code that locks the sim card until you enter the correct code. This protects your account, even
if your sim is put into another handset.
If this is the code you need then:
Pin Unlock Code (PUK)
If you miss keyed (or forget) your SIM PIN code, and enter the wrong one 3-5 times in a row, the sim will lock up, and you'll need to enter the unlock code to release it. You should ask your Service Provider for this code when you need it. Don't try to guess it, because after a few wrong guesses, the sim will be permanently disabled.
You should have a PUK number, on the plastic card where your sim card was. Enter 2-3 more pin numbers and your phone will lock itself and request the PUK number... tap it in and hey! Presto.
PUK number is available from your network service provider.