2. If this is not what I said, please try to restore the factory settings and enter *#7780# on the keyboard to restore various personalized settings (this is not a lattice machine). The default password is 12345 (if it has not been changed).
After this operation, the text message and phone book are still there.
If not, enter *#7370#. This code word is the soft lattice machine, and general problems will be solved through it. But before you do this operation, you should back up the phone book and information, otherwise it will be gone, and there will be pictures and music stored in the phone memory.
3. Hard grid: first turn off the power supply, then press the dial key, "*" key and "3" key when turning on the power supply, and press and hold the power supply 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. Similarly, before doing this operation, you should back up the phone book and information, as well as the files stored in the phone memory.
If it's not good enough for you to try Phoenix again, it's still safe to brush the machine. At least I didn't break it. I'll give you a link to the brushing tutorial, which is to teach you to brush 5800. The process is similar. You can brush according to this method:
/frmView.php？ Yes & subccatid = 297 & bookid =1791932. ref0=/s？ wd=5800+%B7%EF%BB%CB
If it doesn't work, you can only go to customer service. Good luck!