We're the same age or thereabouts. I have very similar memories. I was lucky enough to get a PowerBook 1400c as a graduation gift from high school. Laptops were still something of a rarity with students, though.

Perhaps because of its relative heft, I don't remember carrying it around much, and certainly not to class. I lived in an older dorm that didn't have Ethernet, so we dialed up to the campus modem bank and either used school shell accounts or PPP for internet connectivity. I ran some PhoneNet and LocalTalk around the dorm to connect with a few other Mac users

I had a Nokia 5190 phone which got a lot of use playing Snake, but it wasn't a constant presence in my life.