In order to hard reset a Motorola V878, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Motorola V878 device will be brought back to the default configuration of a brand new device.
1. Power up the phone by pressing the Power button.
2. Now open Main menu and enter Settings and Security.
3. Type in the lock code. It is 1234 or 0000 by default, or it may be the last four digits of your phone number.
4. Now select Erase/Reset and Reset Phone. Confirm with the Left Softkey.
5. Your phone will now reset and restart, completing the hard reset process.