How to factory resetNOKIA Lumia 521? How to wipe all data in NOKIA Lumia 521? How to bypass screen lock in NOKIA Lumia 521? How to restore defaults in NOKIA Lumia 521?
The following tutorial shows all method of master reset NOKIA Lumia 521. Check out how to accomplish Hard Reset by hardware keys and Windows Phone 8 settings. As a result your NOKIA Lumia 521 will be as new and your Qualcomm Snapdragon S4 Plus MSM8227 core will run faster.
Switch off your phone.
Next press and hold together Power button + Volume down
Release Buttons when device will vibrate.
When you will see exclamation mark press this sequence of keys: Volume Up -> Volume Down -> Power button -> Volume Down