Have you guys known this issue? Does this happen to other android devices? Currently i have viber installed to my Tab. When i have a missed call in viber i noticed that the screen won't automatically lock itself. I'm bothered by this because what if someone called me 12MN and i slept at 11PM. The Tab won't be able to lock itself for hours thus draining the battery. I tried disabling it from the application itself but it does not solve the problem. The Tab automatically lock itself no problem when i don't have any missed calls. PLEASE HELP.