Here are the reset codes I have collected:
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!! Thanks to Tris for the headsup!!)
*#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
To perform a Hard Reset, follow this instruction TO THE LETTER:
1. Restart the device. NOTE: You DO NOT have to remove the battery!! You can
JUST AS WELL use a FREE tool like TaskSpy: http://www.pushl.com/taskspy/
The restart option in TaskSpy is in the menu under "Tools"; Hotkey is Shift+Ctrl+R
(Non-related bug issue in v0.96: do NOT press the Menu key while in Preferences:
TaskSpy crashes and burns; use the ARROW keys in stead!)
NOTE: If you still decide to remove the battery and the battery is out too long,
you must press the power button on the front to start the device.
2. When the image that says "NOKIA"(NOT the HANDS: that's TOO LATE!!!) comes up,
3. press AND HOLD Shift+Ctrl+F(don't stress, there's PLENTY of time) and
4. KEEP HOLDING KEYS(this is the CRUCIAL point) until you FIRST get A BLANK SCREEN, and
5. KEEP HOLDING KEYS(this is the SECOND crucial point) until it prompts you to confirm the format!
You're welcome.

And BTW, it's "Shift+Ctrl" and NOT "Ctrl+Shift", so you're "shifting" a control character
and not "controlling" a capital letter. But this is just formal: it actually doesn't matter
if you press the Shift before the Ctrl or the Ctrl before the Shift,
as long as you press the character LAST.
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!! Thanks to Tris for the headsup!!)
*#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
To perform a Hard Reset, follow this instruction TO THE LETTER:
1. Restart the device. NOTE: You DO NOT have to remove the battery!! You can
JUST AS WELL use a FREE tool like TaskSpy: http://www.pushl.com/taskspy/
The restart option in TaskSpy is in the menu under "Tools"; Hotkey is Shift+Ctrl+R
(Non-related bug issue in v0.96: do NOT press the Menu key while in Preferences:
TaskSpy crashes and burns; use the ARROW keys in stead!)
NOTE: If you still decide to remove the battery and the battery is out too long,
you must press the power button on the front to start the device.
2. When the image that says "NOKIA"(NOT the HANDS: that's TOO LATE!!!) comes up,
3. press AND HOLD Shift+Ctrl+F(don't stress, there's PLENTY of time) and
4. KEEP HOLDING KEYS(this is the CRUCIAL point) until you FIRST get A BLANK SCREEN, and
5. KEEP HOLDING KEYS(this is the SECOND crucial point) until it prompts you to confirm the format!
You're welcome.

And BTW, it's "Shift+Ctrl" and NOT "Ctrl+Shift", so you're "shifting" a control character
and not "controlling" a capital letter. But this is just formal: it actually doesn't matter
if you press the Shift before the Ctrl or the Ctrl before the Shift,
as long as you press the character LAST.








