In order to hard reset a Cect P3511, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Cect P3511 device will be brought back to the default configuration of a brand new device.
1. Turn on the phone.
2. Type *#6810#, press call button.
3. Now tap *#337#, press call button.