

This is the obvious reason that you will need a factory reset. Either way, you do not want any of your personal information and important data or files to remain on the device. If you want to sell or give your device to someone else. You can restore all the data from your Google account later, and this option makes all the settings of your phone the same as the default settings, as well as the entire data of your phone is deleted, which makes your phone completely clean. Reset is an option to erase all stored data on your phone, such as your installed apps, photos, videos, music and brings your phone new conditions like when you first time booted your phone.

