How to use Guest Mode on the LG G3

Guest Mode lets you give other people limited access to your LG G3

We've all been there — you want to show someone something on your phone, but without handing over the keys to all your personal data. There are third-party apps that can help out, but the LG G3 comes with a built-in feature that makes it easy to give other people limited access to your device.

source: androidcentral