So I have an iPhone 6 and noticed my LTE speeds were slow. I ran a few speed tests with 3 LTE bars and they were between 5-7Mbps. I popped my SIM out of my iPhone 6 and put it in my old iPhone 5 and immediately got 22Mbps. I did a few more tests and they were between 20-30Mbps on the iPhone 5. Today I did some more tests around town and had the same results. I have not seen over 10Mbps with 5 LTE bars with my iPhone 6. I contacted Apple and they said because it is a "carrier data issue" that there is nothing they can do. I contacted AT&T and they did a bunch of testing with me but still haven't found anything. So what can I do at this point? I feel like Apple should say something other than "this is not our fault."