I have an iPhone 5S 64 GB, ME312LL/A) I purchased as a refurb from a reputable vendor in November 2014. It's my wife's, and her previous phone didn't have LTE, so neither of us noticed right away that even in areas AT&T has good LTE service, her phone never registers an LTE connection. Only 4G.
When a SIM card from a phone with working LTE is inserted into this iPhone 5S, the service indicator shows LTE. I suppose I need to contact AT&T then?
By all appearances the phone had never been used (original packaging, pristine accessories,OEM screen protector wrap still on). What would cause a phone to function normally all ways, but not register an LTE connection?
- toggling LTE off/on in Cellular Settings.
- checking for carrier updates
- resetting network settings