I recently bought an iPhone XR in the fall and have had fine connection everywhere since then. My mom also bought the same phone at the same time on the same plan. Recently, I have begun to get 1x connection or worse(Searching or no connection) specifically when I'm in buildings. It started in my house, but it has become marginally better as the connection now says LTE, but it doesn't seem like I'm actually getting that speed because things aren't loading. All other buildings I've been in have given me 1x or no connection. My mom has the same phone on the same plan and my sister has a 6s on this plan and they are receiving LTE everywhere. I've tried airplane mode and removing the SIM card but none of it has given a permanent solution. Any suggestion would be helpful, thank you.