One day out of the blue random, the swipe gestures stopped working. If I was in an app, I couldn't go home, and i couldn't access multitasking either. I restarted my phone, and even reset the settings, still nothing. If I use three button navigation it works, but nothing else.
steps to turn safemode;
long press on power button>
long press on power off option>click on safemode >your mobile will restart and turn into safemode.