I’m on my third iPhone 6+ battery. And I’ll put a fourth in it before I pass it to my MiL this fall.
It certainly runs slower, but I have no idea by how much. I finally realized some automiscorrect actions that I wondered if were done after I hit Send, were actually just slow to display, so I missed them until I read the original post.
I have T-Mobile, which uses band 12. The 6+ does not support band 12. My coverage is normally fine, but there are times I lose it. Getting 12 will help, a lot. And I want band 71 for some degree of future proofing.
Otherwise, I’d live with the poor battery. I’ve learned to drive with it plugged in when using Waze and Pandora. Sometimes I plug it in at my desk.
I’d like to get five years out of the next one- but that’s probably dreaming. After five years, I’ll probably be looking into a watch or such, for health reasons. And that phone/watch/health monitor will likely be bought as a package deal. Maybe specially designed for each other. I expect some future monitors- err, “watches” - will need an advanced phone, with limited use on older phone models. An incentive to upgrade.