Settings,Cellular,Network Selection,turn off automatic. Pick one of the Sprint choices instead of T-mobile. You may find better speed/connectivity. Doubled my speeds. Others on Reddit have similar results. YMMV :smile:
That would be correct, at least at this time. My T-mobile purchased iPhone SE that is normally on T-Mobile network can be switched to Sprint towers in the settings on my iPhone. My iPhone now displays Sprint LTE as its network because I picked Sprint network. Choose whatever is better or faster depending upon where you are. Pretty cool!