Flashing new firmware is a primary method for removing forgotten security codes or passwords. By rewriting the system, the device is restored to its original factory state, resetting any user-defined locks to the default code (typically 12345 ).
However, one of the most common frustrations plaguing this otherwise robust device is the dreaded prompt. Whether it’s a forgotten security code, a second-hand phone with an unknown password, or a software glitch that triggers a lock, many users find themselves staring at a permanent lock screen. Nokia C1-01 Flash File Without Password