Originally Posted by solefald
Has nothing to do with firmware, but rather with the traffic you generate.
Deep packet inspection would easily reveal that the traffic is originating from something other than an iPhone. Whatever firmware you use, all network traffic goes through AT&T routers, and they know what you are doing.
I understand what you are saying but how come this only started w/ 4.3.1? Did at&t just get fed up and said enough since they were coming out w/ their own plan?