To turn on your GRAVITY 3, please press for 3 seconds on the power key that you will find at the top right of the tablet.
If this is the first time you turn on your tablet, you will need to configure some parameters. You can get additional information and tips in the Getting Started section of our support center.
Your tablet incorporates a very simple unlocking system by default, which consists of sliding your finger over it as in the following image.
You can learn how to configure more Android settings in the How to use Android article in our support center or during the setup wizard.