Over the last week I have woken up late twice cause my alarm on the phone hasn't gone off. I come to find out that the phone's battery is completely drained. When I go to bed, the phone is at 100%, and I'm only asleep for about 7 hours. Anyone know why this is all of a sudden happening? I have a pre plus with the 800mhz patch. All other patches I have on the phone have been on there for awhile.