Internet & SIM in Trinity
Connect The dialling code for Jersey is +44, same as for mainland Britain and Guernsey, so to call between them you don't dial +44. It's as if Jersey were a mainland city with dialling code 01534 and domestic call charges. Except for a very few dead spots, all of Jersey has 4G from each of its three carriers: Airtel-Vodafone, JT and Sure, and there is Wifi in many public places. As of Sep 2022, 5G has not rolled out on Jersey. For the latest info see JCRA[dead link], as Nperf doesn't track coverage in the Channel Islands. Visitors from UK or Europe need to check their mobile provider for roaming charges.
Source: Wikivoyage · CC BY-SA 4.0. Text may be shortened for this guide.