ATTENTION!!! You will lose all your data!!!
If you forgot your password, PIN, pattern lock, or if yo have a problem with OS, or you want to erase all data...
If you have a problem with navigation in the Android System Recovery menu, you can see explanation how to fix it in this guide.
To enter the tablet into Android System Recovery menu, press and hold the Volume UP, Home and Power ON buttons. When you see the Samsung Galaxy Tab 3 logo release only the Power button.