*#7328748263373738# : Sometimes used to reset the security code itself back to default. Key Technical Details
If you forgot the phone’s (not network lock): nokia ta 1034 unlock tool
If you can still access the menu but want to clear the security code back to its default, you can use built-in dialer codes: Default Code : The factory-set security code for most Nokia phones is Hard Reset Code *#7328748263373738# : Sometimes used to reset the security
Select "8th Boot" or "Auto Detect" depending on the software version. Connect the Phone: Power off the Nokia TA-1034. Remove and re-insert the battery. Click "Start" in the software. nokia ta 1034 unlock tool
You have forgotten the 5-digit code required to access the menu.