After 2 years of being AT&T's well-lubed bottom bunk I just switched in favor of T-Mobile's $50 a month prepaid unlimited everything plan (Set up was a bit expensive but AT&T is the Britta of cellphone plans). Phone reception and service-wise everything's great. BUT for an unlimited data plan the "E" is....well, useless. I can't use maps. I can't compulsively refresh my e-mail/facebook/twitter and a simple google search takes forever. By contrast wi-fi flies. Does my phone/set-up have a particular issue or is it just the innate suckiness of this particular network? Is there anyway to find out? P.S. I use an unlocked 3G iPhone.