In order to hard reset a Bird D615, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Bird D615 device will be brought back to the default configuration of a brand new device.
1. Hello! First, turn on your phone.
2. Now type in any of these sequences: *#77218114# or *#881188# or *#94267357# or *#9426*357# or *#19912006# or *#118811# or *#3646633#
3. Your phone will now reboot. Yaay!