How to reset your Nexus 4 to factory defaults

 At any given time you can reset your Nexus 4 smartphone to the factory default settings, meaning you will bring your phone back to the same state as it was on a day when you took it out of the box.   

Tap Apps icon.

Tap Settings.

Tap Backup & reset.

Tap Factory data reset.

When you do a factory reset of the Nexus 4 mind all your existing data on the phone like your music, photos, accounts, system and app settings,.... will be gone. So don't forget to back up your phone data before doing factory reset.

Confirm to continue ...

 

... confirm once more by tapping Reset phone ...

... your lost chance not to erase all your data. If you are really, REALLY sure you want to erase all your personal information and downloaded app, tap Erase everything.

Wait for the reset process to finish and you will end up with the clean Nexus 4 as it was on the day you got it.