In order to hard reset a Telit Estremo, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Telit Estremo device will be brought back to the default configuration of a brand new device.
1. Turn on the phone.
2. Type in one of these codes - *#94267357# *#9426*357# *#881188# *#19912006# *#118811# *#3646633# *#77218114#
3. Done! Phone will now restart, thus completing the hard reset process.