But now it can boil the oceans faster by a few dozen orders of magnitude!

As of this calendar year, my school has implemented a complete smartphone ban. We used to have to put them into a holder at the start of every class, but that wasn’t always well-enforced. Now, they’re not allowed to be visible, audible or even on you at all. If you’re caught with one, you have to hand it in and you’ll only get it back at 16:00. There are still some dumbasses who get caught using one during the lesson, but it’s now much better than before. People also talk to each other during the breaks now.

If you need a smartphone for MFA for another device, I would suggest a password manager. Something like bitwarden.com can store TOTP secrets (the six digit rotating code) that aren’t as easily obtained through fishing. I use KeePassXC, but that’s because I also have my own Nextcloud instance to synchronize my .kbdx file across all of my computers.