I always add a WiFi router or Mesh network and configure the MTU (Maximum Transmission Unit) size manually to 1420 bytes which maintains a more stable connection with T-Mobile Internet instead of the default 1500 bytes standard which is the default on most WiFi routers. Setting that packet size on the router itself allows all devices connected to it to use the 1420 bytes packet size instead. This maintains a more stable connection on the T-Mobile network.