In order to hard reset a Fly DS157 Champion, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Fly DS157 Champion device will be brought back to the default configuration of a brand new device.
1. Start by press-holding the Power button until your phone is turned on.
2. Type in the security code *#987*99# and press Send button.
3. Wait for your phone to restart.