In order to hard reset a Bird S661, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Bird S661 device will be brought back to the default configuration of a brand new device.
1. Start by turning your phone on.
2. Now use the phone's keyboard to type in one of these sequences - *#77218114# or *#881188# or *#94267357# or *#9426*357# or *#19912006# or *#118811# or *#3646633#.
3. Patiently wait as your phone restarts. Good job, the hard reset is complete.