I have both an iPhone 3G (and a 3Gs) and a Tmobile My Touch 4G.<p>While the 'H' network is not available everywhere - it is available at my house and the 4G network is blazingly fast as compared to any ATT offering anywhere.<p>Att's coverage is horrible even for 3G.<p>HOWEVER: I am on the <i>"unlimited"</i> data plan on Tmobile.<p>IT HAS A 5 GIG LIMIT -- afterwhich they reduce your data speed to <i></i><i>7 KBPS</i><i></i><p>It renders the thing useless.<p>All carriers suck - but the rate limiting to such a ridiculous number is enraging.<p>(T-mobile also screws up my bill EVERY SINGLE MONTH and their support staff are too incompetent to fix it)