In order to hard reset a Vertu Signature, you should perform the following steps.

Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Vertu Signature device will be brought back to the default configuration of a brand new device.

1. Power up the device.

2. Starting from the Menu, go to Settings > Restore default settings.
3. Type in the password, confirm. Phone should now reset'n'restart. Done.