Info: -Samsung Galaxy S2 i777 -Ice Cream Sandwich 4.0.3 -Alternate between Apex and Nova (both free versions) My S2 has been randomly shutting down while on standby mode recently. Most of the time, I had to keep the power button pressed for about at least 5 seconds, then hold it again to boot it (as you would usually hold it to power it on). On a few times, I had to remove and reinsert the battery. I then notices this happened to my battery: http://i.imgur.com/jQ4Vx.png So i calibrated my battery by letting it run out, then turning it on and letting it run out until it could not power on any more (I only had to do this once). I then charged it while it was off, disconnected for a bit when it reached 100%, then reconnected till it reached 100% again (the intervals got smaller and after about the 4th time it hi 100% within about 15 seconds). I then tuned it on and cleared the cache, but unfortunately, it is still randomly shutting down while on standby. Thoughts on how to solve these issues? (Both random shut downs while on standby and battery calibration).