Nokia 3310 reset Restore factory settings
Select Menu > quick menu 6.4 to Restore Nokia 3310 factory settings The preset code is 12345
Restore factory settings (Menu 6-5)
You can reset the menu settings to their original values. For this you need the
security code. The preset code is 12345.
This function has no effect e.g. on the following functions:
• the names and phone numbers stored in the Phone book
• text and picture messages
• phone numbers listed in the Call register menu
• call divert
You can also use a special cable (Fbus F-Bus cable) to reflash your Nokia 3310 software. Latest N3310 firmware version is 6.39

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