..cyberia core..

here you will find some useful phone codes.

Nokia Series 40 and Series 60 Reset Codes:

Full Reset: (clears everything off the phone memory!! Be sure to back up your contacts!!):

*#7370#, 12345 and then Yes.

Soft Reset:

*#7780#, 12345 and then Yes.

(Also works on Nokia S40 phones, NOTE: On the 6230/6230b, same as going to the Factory Reset option under Settings!!)

*#335738#
*#delset#

This deletes the Email, GPRS, MMS settings that cannot be erased via phone options. (Series 40 phones only)

Nokia 9300 (not confirmed) and Nokia 9500 (based on link below):

1. Turn off phone and take out battery
2. Insert battery, and while it boots up press and hold Ctrl + Shift + F
3. After a few seconds you will be asked if you want to format or cancel

http://www.howardforums.com/showthr…threadid=580322
source: http://www.howardforums.com/archive/topic/640135-1.html