I have an iPhone 5 32 GB and I am with AT&T. In my phone the LTE speeds are very slow, sometimes as slow as less than 1 mb download. The highest I have ever gone is 11 MB. The thing is that my friend has the exact same phone and is also with AT&T and he gets speeds of 20 MB standing next to me, while I get 5 MB. I went to AT&T and replaced my SIM card and have also restored the phone with no changes in performance. On WIFI, everything seems to be fine. I wanted to know if there is a know issue about LTE anthemas on some iPhones that I don't know off and if its happening to anybody here.