I’m a new customer, and I’m noticing a big problem with my service. When I am driving through a roaming area, my phone doesn’t switch back to native service when I re-enter T-Mobile’s coverage area. It will persistently roam, even after I restart my phone or put it into airplane mode. I currently use a OnePlus 7T (factory unlocked), but I also tested this problem with my factory unlocked Galaxy Note 8. Both phones consistently roam in areas where T-Mobile states I should have coverage. Only when I’m parked for a few minutes in one spot does my phone switch over to LTE service and recognize the T-Mobile service.
What’s going on? Is it just a weaker signal? I’m about to switch back to AT&T. I have duel-sim capability on my phone, and when running both services, only T-Mobile has this issue.
Does anyone have any guidance on this?