Is anyone else having service problems with the iPhone 4? iMessage and text messaging have been acting up for a few weeks now (right about when the iPhone 5 was released). I have this problem at work (zip code 48310) but not when I am at home. Is there something going on in this area? Also, my battery gets drained when I am at work but is fine at home? What is causing this and how or when can it be fixed?