In order to hard reset a AIRNESS XS99, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
AIRNESS XS99 device will be brought back to the default configuration of a brand new device.
1. Press and hold the Power button until the phone is turned on. Unless it is already on, in which case don't do that.
2. Open Menu and Settings.
3. Select Reset and Master Reset.
4. Confirm the operation by selecting Yes. Type in this safety code - 1234.
5. Done.