Three code to reset the phone Nokia C6-00 C5-00 5800 Series 60.
1. Restore the original (working) phone settings by default
2. After entering the phone for 3-4 minutes restarts. At the same time erases all the programs that it was in operation mounted EXCEPT factory settings. After rebooting, they tend to disappear all the glitches and some viruses!
3. Completely clean your phone from any viruses are irreversible, possibly erase all block codes even when changing sim cards.