Navigation bar disappears after system update on Galaxy Tab 2 7.0 I just received a Samsung Galaxy Tab 2 7.0 (GT-P3113TS) from school and oddly enough after playing with it just for several minutes, it wanted to update the OS. It ended up updating twice (one larger update and then a smaller ~60MB update) to a final version of Android 4.2.2.

Now, after the system starts up I no longer have a navigation bar at the bottom.  Once I get into an application or the system settings I simply cannot press any button to get out of it.  There is no home or return button or anything like unto that.  Am I entirely misunderstanding how Android's UI works or have these updates completely and entirely broke the system such that I'm no longer able to use this device? 

To clarify:



As per request, here is a snapshot of my screen:
Its very easy to bring back navigation bar on any android device. 


Download Root explorer or any other file explorer
access root permission and goto /system folder
Open build.prop and add this line    qemu.hw.mainkeys=0
If this line already there than it must contain 1 instead of 0. Change it to 0
Or use Gravity box to enable navigation bar.


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