In order to hard reset a Nokia 9110i Communicator, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Nokia 9110i Communicator device will be brought back to the default configuration of a brand new device.
1. Press Power button to turn on the phone.
2. Now open the Dialer and type in this code: 2945#*101# or 1809#*101#
3. Confirm by pressing the Call button.
4. Wait for your phone to reset and restart. Done!