On the charging problem of mobile phone short message

Restore the factory settings (soft grid), format the memory card (on the computer), and then it is gone. Hard mobile phone: turn it off first, press the dial key, * key and "3" key when turning it on, and turn it on until the word "NOKIA" appears (no key can be released during this process). Wait a few seconds until "Formatting .../.../"appears, then you can release the button above. After a few minutes, the system is formatted and the phone automatically restarts to enter the standby screen.