Every community decides for itself what technologies to adapt. The nearest to me have a single phone booth in the front yard of one member's house. Anyone wants to use the phone, they go there to make a call, and most only use it if they need to make an appointment at a hospital for serious illnesses.

Others not quite as close are a fair degree more liberal in what they adopt, while I imagine there's probably a few that are more strict.

> But the Amish do receive mail and use phones.

I am assuming you don't mean to generalize to the degree that is being conveyed at first glance in your explainer comment.

Amish people are not a monolith. As a culture it is quite a spectrum, from Beachy to Swartzentruber.