My husband just got an infuse, after he first turned it on and made his first call he also tried to check something online and got a no data connection message. Same thing when he tried to use the market. Since he didn't really do anything on the phone he did a hard reset this seemed to fix the problem or so we thought. It worked for all of 10 minutes then the same thing happened. This happens even if he is on wifi. Also his phone isn't automatically switching from wifi to the mobile network when he walks away from his wifi source.