Nokia
8 Hard Reset
1st method:
1. First hold down the Power key in order to switch off the device.
2. Press and hold the Volume Down + Power key for a short while.
3. Release the Power key as soon as the Android
logo pops up. Keep holding the Volume Down until the boot mode pops up
4. Choose recovery by using to navigate Volume buttons and to confirm Power
key.
5. When the Android logo pops up hold down the Power key for a while.
6. While still holding the Power key, press and release the Volume Up button.
7. Hold down the Volume Down to choose wipe data/factory reset, and then push
the Power button to confirm.
8. Select Yes--delete all user data. Use Volume Down button to scroll and
Power button to select.
9. To restart the phone select reboot system now.
2nd method:
1. Power
on your device
2. Go to Settings and then to Backup
& Reset.
3. Tap Factory Data Reset and select Reset
Device.
4. Tap Erase Everything if you are sure you want to clear all your data.