There must be a soft cap on the GoPhone plan.
Ya there will definitely a softcap but not a ridiculous one though. I'm sure we can get 4G around ~ 10-15Mbps and LTE 15+Mbps....no point in AT&T turning on LTE Access to GoPhone and give speeds of like 1-2Mbps....because i don't mind leaving Straight talk (Getting 3-9Mbps - just did a test right now) but if I'm going to be paying for "LTE" I want 10Mbps+.
Yes T-Mobile is a great option but for people like me who travel, I like to have my "3G" all along the interstate rather than a "o" or "E" which T-Mobile gives as it has next to no coverage out side of cities/towns/counties....