I am going to sell my handset on ebay since I have now replaced it with an N95. I was wondering if anyone has any tips for how to make sure the phone memory and hard drive are completely wiped and reset?
Tips for factory resetting an N91
You can format the HDD directly from your phone and you can connect lake a massive storage unit to your PC and clean the disk (write only 0 in the HDD). To clear the flash memory, you can make a hard reset:
If you get you phone into real trouble there are two resets available. Note these should be treated as a SW update (i.e. you will lose data on your phone memory so back it up). Follow the standard backup procedure for you phone before dong this (take a look at the HDD guide TIP section). The first one is *#7370# (Code 12345), it will restore the phones memory and clean it up. If you have managed to get the phone to a state where it will not even boot up then - Press and hold simultaneously Green, 3 and * and then press simultaneously power key.
Luck! 😃