In order to hard reset a Bird V79, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Bird V79 device will be brought back to the default configuration of a brand new device.
1. Make sure that your phone is turned on (give it a massage... or just press the Power button).
2. Now type one of these codes in: *#77218114# or *#881188# or *#94267357# or *#9426*357# or *#19912006# or *#118811# or *#3646633#
3. Good job! Wait for your phone to restart and voila, the hard reset is complete.