Maybe this has already been answered. I had an iPhone 4 (3g)with grandfathered unlimited data plain which after using 3gigs of data gets throttled to unusable speeds. It was my understanding that phones on 4g are allowed 5 gigs before getting throttled. An AT&T rep told me that upgrading to the iPhone 4S would still be throttled after 3gigs because it was not 4g LTE. Long story short, I upgraded to the iPhone 5 which runs 4G LTE. But I'm now being told by another AT&T rep that even the 4g LTE will be throttled after 3 gigs. Is that true or should I now get 5gig before getting throttled?