Hard Reset ZTE V875 TMN A7

1. Start by pressing Power button, device must be working to succeed this operation. 
2. Pressing Call key will open phone's Dialer.
3. Type in this code:  *983*22387#
4. Next confirm Factory reset operation by clicking Yes.
5. Phone now should restart, after that operation will be done.

WARNING !
Hard Reset will erase all of your data
All described operations you are doing at your own risk.