Forgot my security code

The default security code for Nokia is 12345
IMEI: 356438012346609
Master code: 0631367461
Close all applications on your phone.
With your phone switched ON, remove the battery.
Then remove the SIM card.
Replace the battery without the SIM card and switch your phone on.
Type in the security codes (any code) until the phone request the Master code, when it does, leave your phone still, don’t use it for 15 minutes, then type in the Master code.
This is the code needed to reset the Security code, nothing else, and it’s for your phone only.
If it does not request the Master code, your phone will have to be connected to a computer via an unlock box to restore the Security code.

The default security code for Nokia is 12345
IMEI: 356438012346609
Master code: 0631367461
Close all applications on your phone.
With your phone switched ON, remove the battery.
Then remove the SIM card.
Replace the battery without the SIM card and switch your phone on.
Type in the security codes (any code) until the phone request the Master code, when it does, leave your phone still, don’t use it for 15 minutes, then type in the Master code.
This is the code needed to reset the Security code, nothing else, and it’s for your phone only.
If it does not request the Master code, your phone will have to be connected to a computer via an unlock box to restore the Security code.

I'm now using LEO Privacy so I don't worry about this situation, I think you can have a try, because I can reset password easily by security question. LEO Privacy Applock Hide Safe Android Apps on Google Play

Elo bro plz help me out,i have forget my security code of nokia 3120c-1c,my imei no. is 354193032090347 plz bro