Just some of the things I'd miss:
* Without my 2FA app I would be locked out a lot of sites.

* I'm a Shazam addict. If I hear a song I know, but the artist nor the title comes to mind, I simply nééd to know. This may sound stupid, but otherwise I keep thinking about it all day and I go crazy. I have the same thing going on with actors, btw, so I always need to have Google close.

* my Instagram accounts

* my calendar. I have an awful memory, so I would be lost without it.

* texting people to let them know I'll be late :0)

I've become way too dependent on that phone. I often wonder how we got around without it. I was about 18 -20 years old when mobile phones became common, so you'd think I'd remember how it was. But I don't, lol