Personal Hotspot switches from LTE and gets stuck in 3G. Won't switch back

Question

Hi There,
My Personal Hotspot on my iPhone 6 switches from LTE and gets stuck in 3G service. The hotspot stays in the 3G service even when I'm back in an LTE zone. The only reason I know I'm back in an LTE service zone is because if I disable hotspot, put my phone in airplane mode, and turn it back on I get LTE service. Please note that if I wasnt using personal hotspot the phone seems to find LTE, go to 3G, and then back to LTE just fine.
This happens while I'm commuting to work on the train and consistently pass between multiple cell phone towers.
Any help?
Thanks!!!

Answer 1

JeffinSF wrote:
To recreate this...First make sure WiFi is off and that you have 3G turned on (go to Settings-->General-->Network) and that you're in a real 3G area (you'll see a "3G" symbol in the upper left of the screen
Then turn off 3G (go to Settings-->General-->Network and turn off 3G.) Wait a few seconds for the phone to switch to EDGE (you'll see the "E" indicator in the upper left of the iPhone screen once it's on EDGE). Then simply go back and turn 3G back on in Settings->General->Network. The phone SHOULD automatically reselect 3G and you'd see the "3G" again in the upper left part of the screen but instead you'll just see the same "E" in the upper left because it's not switching. To force the switchback to 3G after performing the above example, turn on Airplane mode and then turn it back off after a few seconds. For me, this always resets the radios such that 3G will again appear in the upper left of the screen and the phone will run on 3G. Otherwise it will just sit on EDGE even though I've turned 3G on. Strange but consistent.
I just tried this and my IP4 switched to 3G after turning back on the 3G and accessing a web site. It took about 5 seconds, but it did switch on its own. It did not happen just sitting there, I had to make it do some work (by loading data).