I have this problem too, and I’ve read through these replies, but I stopped reading them when the answers are pretty outdated. And the seemingly good answers as far as updating the latest firmware, which I did, AFTER this problem already existed. And as I have read, some of us have had this problem after you updated the latest firmware. So we are all having the same problem and it doesn’t seem to be because of the update. And of course it’s not the simple solution we’re always told to do, power restart the phone. Done, 6 times today at least, (could be 7 or 8 times). Then turn off WIFI, if it doesn’t work turn WIFI back on. Ok, done, but why would a WIFI connection have anything to do with having 4G or LTE? Nothing, but I did it anyway. Then they say change to Airplane Mode, o...k...doesn’t work, OBVIOUSLY, so I turn Airplane Mode back on. Then turn off cellular data, doesn’t work, turn it back on.