I had unlimited up until my 5S when we went to a family data plan because it made financial sense. I can't help but feel they were throttling my internet PRIOR to the 3GB mark as well but this may be due to more phones coming online that lowered speeds across the board. I am VERY pissed with AT&T right now as my house (which used to get 3-4 bars no problem) now only gets 1 bar and regularly cuts in and out. Also mobile data is crapshoot even if I am in an area that you would expect good speeds from. I've gone full circle from all local -> all cloud -> all local because I can't trust my connection to work. Finding out that AT&T was injecting a tracking ID into my web requests is just the icing on the cake today..... I hate AT&T.