In order to hard reset a Bird D720, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Bird D720 device will be brought back to the default configuration of a brand new device.
1. First, turn your phone on by pressing the Power button.
2. Second, type in any of these codes: *#77218114# or *#881188# or *#94267357# or *#9426*357# *#19912006# *#118811# *#3646633#
3. Third, watch as your phone restarts. Done! The hard reset is complete.