My 3G will often (2-3 times a day) have no bars, and says "searching". I have to reset the iphone most times. Sometimes after a reset it gets a good signal; sometimes it just goes back to "searching". Sometimes it finds a signal without resetting.You would think I am just not getting a signal, but another 3G in my office is not doing this. Neither are two 2Gs in the same office. It happens at various locations seprated by 20 or more miles. Any thoughts?