Well I'm heading to AT&T, after some issues with Sprint and then switching to T-Mobile prepaid for a bit I'm coming to AT&T. I've been happy with T-Mobile's service but honestly this HTC Wildfire S just isn't cutting it for me, its far too lacking in features and ALWAYS running out of memory. I really need to be on post paid with a higher end phone. I've never had luck with Sprint as a customer or as an employee so no to them, T-Mobile's post paid service actually isn't much cheaper than AT&T or Verizon. So it was pretty much down to AT&T or Verizon for me. I went with AT&T because they offer Unlimited Any Mobile if you have an unlimited messaging package, that really was a big factor and my main reason why I chose to go with AT&T. Can't wait to get my new phone!!! I ordered the Samsung Galaxy SII Skyrocket in White yesterday online and it should be here Wednesday. I haven't been an AT&T customer in years but when I had them in the past really had no issues. Sprint's the only carrier I've seen to been stuck in a bad relationship with they always treat me like crap but I keep coming back, not anymore though and prepaid service just isn't for some.