1.- Basic Reset or Soft Reset for nokia 5233
This option restores the .ini files from the ROM.Does not erase data (photos, videos, documents) or applications froma third party. Key Code *# 7780 # (click this combination of keys on thekeyboard in the mobile).

This option restores the original operating system from the ROM.Formats the C: partition and deletes all data including the memorycard. Key Code *#7370# (click this combination of keys on the keyboardin the mobile)
2. Turn the device off.Pres and Hold Shift + Space + BackSpace keys.Turn on the device by pressing the ON button.Wait until th Nokia logo appear.
Important: To proceed to reset, the battery must be full and themobile device connected to the charger. If during the course of reset,the mobile stop receiving electricity it can ruin the internal flashmemory of the mobile device and stop function.