Okay here is the problem and I tried searching around to fix this issue. I have a 3G iPhone and when I am making calls and want to switch to speaker phone because I am driving, my iPhone drops the call automatically. As i watch to see what was going on. When I repeated the process and clicked on the speaker phone icon, the reception bar drops to ZERO and the call that I made is lost. I am sure it is not the person I am trying to call because I tried this several times calling my voice mailbox. Please help guys I dunno what to do and I can't return the phone.