My wife is running a T-Mobile Note 10+ and having major issues with the WiFi and mobile cell service. She constantly runs into her apps like Netflix and Plex saying she has no connection. She's complained of the WiFi being bad and having to disconnect from it, and then she can use LTE to watch shows, and then sometimes LTE stops working and connecting to WiFi fixes it.
Here's the thing. I finally was able to see it when it was having a fit on the WiFi. Going into the connection settings showed it was connected to our 5GHz WiFi at 7Mbps connection speed. Nothing was loading. This was on a 1300Mbps link. I disconnected from the WiFi and reconnected to it, without moving the phone's location, and voila! It reconnected at 300 something Mbps and everything started working. I believe it may be doing the same with LTE as it cuts out randomly and constantly. I saw it myself while we were driving somewhere and she couldn't load websites. My phone (OnePlus 7 Pro) is on T-Mobile as well and I have NEVER run into these issues. We are on the same provider / plan.
Her phone is fully updated and isn't rooted. I haven't touched it as a tech nerd so it's running as a total consumer as far as settings go (haven't played with APN or wireless radio or anything).
Has anyone else experienced these issues? Does anyone have any ideas to fix this?