: If you have changed the code and forgotten it, you can attempt to reset the phone to factory settings using a hardware key combination: Turn off the phone.
: This is the unique 7 to 15-digit unlock code provided by your carrier or a third-party service. NOKIA MODEL 100 TYPE RH 130 UNLOCK CODE
Understanding the Nokia 100 (RH-130): Security, Simlocks, and Unlocking Realities : If you have changed the code and
Professional hardware like the "J.A.F." or "Griffin Box" could force-unlock the phone by rewriting the PM (permanent memory) file. These tools are now legacy, expensive, and require Windows XP and serial ports. unless you are a vintage phone collector with the equipment. NOKIA MODEL 100 TYPE RH 130 UNLOCK CODE