There are a few reasons why you might want to factory reset your Nexus 6, reverting it back to its out-of-box condition. Maybe you've decided to sell your device. Perhaps you want to eliminate any problematic apps and start again from scratch. Whatever the reason, it's easy to clear out your apps, photos and other content and start again from scratch.
Factory resetting your Nexus 6 is a simple enough process. And it's pretty similar on most phones running Android 5.0 Lollipop.
- Open the Settings app, either by finding it in the app drawer or tapping the cog icon in the notification shade.
- Scroll down to "Backup & reset"
- At the next screen, tap "Factory data reset"
- To confirm you choice, tap "reset phone."
The following screen will show you everything that'll be removed if you follow through on the reset process. As the name suggests, factory resetting the Nexus 6 will return it to its out-of-box condition, as it was when it left the factory.
Once you're done, your phone will reboot, wipe all your apps and other personal data, and start over from the usual Lollipop setup wizard.