The hidden feature is also known as “Multiple User Support” because it literally allows you to create another user with its own configurations. How it’s done?
All you have to do is to go to “Settings”, then tap “Users & restrictions” and you will see the “Add User” button at the bottom. Click it to change the profile name (for that user) and even control (allow/disallow) the apps that “new user” can access. After that, press and hold the power button and you’re able to see the “new user” name you have just created. Select it and it will bring you to the new settings you have set earlier. See it in action on the video below:
Jelly Bean Hidden Feature: Multiple User Support
Video Credit: pocketnowvideo via YouTube