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LilirWyddfa https://www.bbc.co.uk/religion/religions/christianity/subdivisions/amish_1.shtml
They don't allow telephones or electricity in their houses, because both of these technologies would literally connect them to the world through their wires. Electricity and petrol/diesel power are used in barns for work purposes. Shared telephones are available outside houses in business premises or telephone booths.
Televisions, radios and stereos are not used, which helps keep the Amish unpolluted by the values advanced by the mass media. One Old Order Amish told the scholar Donald B Kraybill that "television is the sewer line that connects you directly to the cesspool of Hollywood". As with other technologies there is a compromise - listening to someone else's radio or watching the TV in a hotel might well be accepted.
For similar reasons, computers with internet access are banned, although Amish can use a computer at an outside workplace.
They don't use cameras because photos break the biblical ban on making 'graven images' (Exodus 20:4)