I just got my IPhone 4 today and was so excited about it. My husband has had one since Day 1 and loves it. When I got my phone I had a full signal in the store, had 3 G with full bars, however when I got home, my phone had 1 small bar, jumps between E and searching and no service. Oddly my husband has a full signal with 3G most anywhere in the house. I thought maybe at work it would be different, but it remains jumping between the 3 (E, searching and no service) and never hits 3G. Previously I had the 3rd Generation and never had this problem.  I have tried resetting, network changes, airline on and off, power completely off and restarting and it makes no difference. I have the same case as my husbands phone, so I know it is not the antennae issue. Any help or advice would be appreciated… I am so disappointed & frustrated!