I came across this Twit for a software tweak for those that have the AT&T Tilt and not running HSDPA on it! Yes! it is there but turned off! here is the link to Clinton Fitch's website!! Great quick fix! Click here

Bruce, I use a Tytnn II on AT&T and observe what I thnk you describe. I start IE and try to open a page and nothing loads. I also notice at the same time that ActiveSync is no longer connected to the Exchange server. Basically, even though the device is showing that it is still connected to the data...