Devices less sophisticated than smart phones were once pretty common in sci-fi novels, but they still achieved the same sort of thing, all the world's knowledge in the palm of your hand.
You can get smartphones for absurdly cheap these days, and while crappy by modern standards they're still technological marvels.
That's a pretty reasonable misunderstanding, I don't speak for anyone but myself but generally as long as there's no malice involved I'm not upset by an accidental misgendering.
I'm on jerboa too and didn't even know there were specific pronouns on accounts, I just chucked mine in my bio.