Almost everyone, not everyone, majority of households in USA had a computer already by year 2000, and that is counting old people without kids who didn't keep up with trends.
So by the time smart phones hit almost everyone had a computer at home. If you are talking about the 90s that isn't relevant, the relevant part is how smart phones changed things, and at that time internet was already available to a large majority at home, smart phones just made it portable.
Not even all geeks had it.