In order to hard reset a Orange Sydney, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Orange Sydney device will be brought back to the default configuration of a brand new device.
1. Power up the phone.
2. Press the Dial button and tap in this code: *2767*3855#. Confirm.
3. Done! Your phone will now reset and restart.