Approximately 2 weeks ago the sinister forces at Verizon downloaded KitKat to my phone without permission under cover of night. Immediately my battery juice was cut in half and charging took twice as long. I took the recommended minor recovery options: pulled the battery and cleared the cache. No improvement. Matters have progressively worsened. Apps lag; the screen is less sensitive, and now my keyboard is becoming less and responsive. Total fail. So now I'm going to effect a factory reset which is going to cause considerable lost time. Will report back the results. Very interested in the results others have obtained via a hard reset.