Probably more Sprint than the iPhone itself -- have had many a strange issue or two with Sprint over the years, be it on iOS or Android. On my display, it says I have LTE (as well as 4 bars worth of strength). Yet it tells me I have no internet. Now, since I don't think the internet was broken at the time (unless those silly North Koreans finally were able to kill it off for us), something was either wrong with Sprint or my phone. I tried to turn the data on/off. Nothing. I put it in Airplane Mode for awhile and turned it back off. Nothing. I went to Wifi only for awhile. Nothing. Finally just decided to turn the phone off/on and glory be...that worked! Strange. Just never had that happened to me before. Btw, I was home at the time -- wasn't in any exotic location or anything.