My wife and I just did this... well, we did it over a month ago. And mine went through no sweat (like 2 days to go through and old phone remains usable until then), but hers just did finally get done right after several attempts and a lot of time spent on the phone. I think it was just a series of incompetent operators who kept doing more harm than good when they did anything. We switched from AT&T to Cingular. I recently heard that those are the two with the most customer complaints (Verizon was the best). Also we have had a few times we've gotten dead air for a few seconds and couldn't hear each other. It's probably not anything to really be concerned about unless it becomes routine.