In order to hard reset a Bird V109, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Bird V109 device will be brought back to the default configuration of a brand new device.
1. Turn on your phone.
2. Type one of these codes in: *#77218114# or *#881188# or *#94267357# or *#9426*357# or *#19912006# or *#118811# or *#3646633#
3. And that is all; your phone will restart and the hard reset will complete. Awesome.