How to factory reset NOKIA N91? How to wipe all data in NOKIA N91? How to bypass screen lock in NOKIA N91? How to restore defaults in NOKIA N91?
The following tutorial shows all method of master reset NOKIA N91. Check out how to accomplish hard reset by hardware keys and Symbian 9.1 settings. As a result your NOKIA N91 will be as new and your ARM9 core will run faster.