FAQ: Exit SiteKiosk Android
To unlock the tablet after running SiteKiosk you can click the "X" icon in the toolbar (upper right corner next to the SiteKiosk logo).
Alternatively you can touch the touch screen on all four corners or slowly drag your finger to all four corners of the screen starting at the top right and moving clockwise (e.g. if SiteKiosk is running in full screen mode) or even press the Home icon of Android 5-10 times within 3 seconds.
This also works on Android devices where a mouse is configured instead of a touch screen (Click with the mouse in all four corners of the screen)
If you still have problems please also see this FAQ: http://www.provisio.com/en-US/CustomerSupportCenter/ArticleDetails.aspx?ArticleID=22209