Originally Posted by
320flyboy320 I noticed a couple of nights ago I was loosing about 20% when I left the phone in airplane mode overnight. It seems to be happening sporadically, so I did a couple of things that seemed to have helped somewhat. I cleared the cache by going to "settings->storage & USB-> cached data" and selected cached data and selected OK to clear it. I then held the power button for about 10 seconds until the phone restarted. I'm not entirely sure what this does by holding the power button for that long, but when the phone restarted it needed to reset the date and time and several other things as well. Last night with the phone in airplane mode I only lost around 3%, so so far so good :)