A hard reset or factory reset will remove all user data from the phone, leaving only the operating system intact. This article describes two methods of resetting the phone. If your phone is unlocked, you can reset it through the settings. However, you will need to use a special combination of keys if the Nokia Lumia 535 is locked.
Lumia 535 hard reset — Special Buttons Method
For the first method, turn off the phone. Press the power button, and then press the Volume Down button continuously for a few seconds. When you see an exclamation mark, release the button.
Afterward, press these buttons in this sequence:
1. Volume Up
2. Volume Down
3. Power
4. Volume Down
Voila! The Nokia Lumia 535 has just been reset.
Nokia 535 hard reset
If you can access the settings menu of the phone, there is an easier hard setting method. To start with, turn on the display. Then, go to Windows phone settings and choose about.
Press reset the phone to confirm the operation. The device will automatically switch off and reset to the factory settings. There you have it.
After you have hard reset Nokia Lumia 535, go to the manual to learn how to get it running once again.