@Bets1982 assuming your hub connects to a standard phone socket you need a "DSL" cable sometimes sold as a "ADSL" lead. These come with rj11 connecters on each end and are widely available online or in hardware stores in various lengths. If you go over roughly 15m you might start to lose speed.
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65inch Sky Glass, 3 Sky Streaming Pucks, Sky Ultrafast + and Sky SR213(white Wifi Max hub) main Wifi from 3 TP-Link Deco M4 units in access point mode
