In order to hard reset a i-mate SP3i, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
i-mate SP3i device will be brought back to the default configuration of a brand new device.
1. First, turn on the phone.
2. Next, press & hold the softkey buttons.
3. Keep holding these buttons. Press, just for a second, Power button.
4. When prompted to, press 0.
5. Your phone will now reset and restart. Voila.