Use Guest mode when you let someone else use your phone. They will only be able to use the apps that you’ve selected. Once you set it up, you can easily change between normal and guest mode. On the Lock screen, draw the guest pattern that you set, which is different from your normal unlock pattern. Tap Help for more information.
To use Guest mode, set the Lock screen to pattern lock. Guests may also use apps not pre-selected but linked to pre-selected apps.