How To Hard Reset Or Format On Bootup (S60v3 S60v5 5800/N97)

Its always a good idea to do a format once every few month or even when you first get your new s60 device.
There 2 ways to do a hard format to the device memory:

1) Once the device is powered on and at the home screen type *#7370# and then enter your security code (default is 12345) and then your device will restart and reset.
2) To hard reset when the device is off hold down the green call key, the number 3 key and the *+ key then continue to hold the keys and now hold the power key, hold all 4 keys until the device boots up and asks for the country etc.



If you own a nokia 5800 XM then the second option is:
2-.Hold the green and red call keys, the camera capture key and then the power key, hold them until the device boots up and asks for country etc.

If your device fails to boot up or gives a contact the retailer message then a hard format on boot will usually sort the problem.
WARNING doing a hard reset will DELETE all user data on the device memory, including contacts, calendar entries and any apps etc you have installed to C: drive, your mass memory/memory card will remain unaffected so any data will still be there, however you may have to reinstall some apps even if they are installed to mass mem/mem card.