There is a bug in the update process that can cause the phone to slow and drain battery like crazy. Doing a reset might clear it up. Its a pain but I did the sa

There is a bug in the update process that can cause the phone to slow and drain battery like crazy. Doing a reset might clear it up. Its a pain but I did the same thing a couple of times through the various updates and now its behaving as it should for about 6 months.