That’s going to be a tough one to call. Nokia Communicator had diary (calendar), web browsing and email features in the 90s. You could also tether off it, but it was dialup and most phones could do that.
That was pretty much the definition of a smart phone at the time.
The neat thing about anonymous discussion on the Internet is that it doesn’t matter. What you have to say is all that matters.
I don’t know anything about anyone and that’s great.