How to factory resetNOKIA Lumia 638? How to wipe all data in NOKIA Lumia 638? How to bypass screen lock in NOKIA Lumia 638? How to restore defaults in NOKIA Lumia 638?
The following tutorial shows all method of master reset NOKIA Lumia 638. Check out how to accomplish hard reset by hardware keys and Windows Phone 8.1 settings. As a result your NOKIA Lumia 638 will be as new and your Snapdragon 400 core will run faster.
First method:
At the beginning switch off the phone by using the Power button.
Afterwards press the Power Button once.
Press and hold the Volume Down button.
You can now release all keys when you see the exclamation point on your screen.
Press the following sequence of buttons: Volume Up - > Volume Down-> Power - > Volume Down.
Success! The hard rest has just been performed.
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