In order to hard reset a Orange Rio, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Orange Rio device will be brought back to the default configuration of a brand new device.
1. First, press'n'hold the Power button until the phone turns on.
2. Type in this code: *983*5651#
3. Tap in the password (0000 or 1234 are default codes).
4. Voila.