On iPhone 13 Pro, and the latency (is that the correct word for the time it takes for the Internet connection to be established?) I have with T-Mobile 5G/5G UC is insane.
It takes several seconds to start an internet connection it seems. A simple Google search or Weather app update can take several seconds for data to be received/refreshed. Once it has connected, it's fast. But very unstable... what's the point when I have to force it to go into LTE for a slower but at least stable connection?
(and yes, tried resetting, calling T-mobile, turning off/on, etc.)