Everything I do online when I'm not in front of a PC I do on that phone. Web browsing, RSS, instant messaging, e-mail, social media, banking, navigation, public transport routing, TOTP auth, music playing, photo taking, weather checking, "smart" home stuff, conference agendas, occasionally some games or even software development (but not a lot these days - I used to program on my phone a lot when I was a teenager though). I even ran Jamulus on it to jam online during covid because it achieved better audio latency than my laptop, long before it got its Android port. Oh, and phone calling sometimes too, even though I've never been a big fan of that. Anything I need to, really.