In order to hard reset a Motorola M3788, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Motorola M3788 device will be brought back to the default configuration of a brand new device.
1. For starters, turn on the phone.
2. Now open Main Menu, Settings and Security.
3. Open Security options. to do that, you will need to enter a lock code, either 0000 or 1234.
4. Now select Erase/Reset and Reset Phone.
5. Selecting Yes will confirm the operation. Yuppie, done.