Mines always on, no auto just always 5G when available. My town has 5G towers everywhere so I always have a stable full 4 bars on the 5G UC connection on T-Mobile. Usually getting around 1000-1400+ Mbps down and around 2-300 up. Even my apartment is right next to a tower so I get those speeds laying in my bed no matter what. My battery is still giving me aroun 12-14 hours of screen on time with 20-40% left at the end of the day. It’s my only device, I don’t own any other tech to limit the amount of tech I use and to only spend money on the latest phone each year. Waiting to get the 14 pro max cause I’ve heard so many people say the 13 pro max gets better battery life which is why I’m still holding on. And my battery health on my launch day 13 PM is 100% still. But yea it’s used for legit every single thing in my digital life. Socials, YouTube, Tv shows and movies, internet browsing, camera work/ videography, editing, all my documents and such are all digital on my phone, work stuff, music, the whole 9 yards on 1 single device. Same reason I get the max, but yes 5G makes no difference to me. LTE might and I mean might yield me an extra hour or so tops, but yea lol. I wouldn’t worry too much unless you desperately need that extra hour on a normal size pro, or regular iPhone model, or mini. Or if your battery health is low, otherwise just use the speed to your advantage if you ask me.