Heading to the UK soon? A prepaid British SIM card lets you use your smartphone, tablet and 3G laptop England without clocking up a massive data roaming bill through Telstra, Optus or Vodafone. One of the best deals is with Tesco Mobile, an offshoot of the British supermarket Tesco. Tesco Mobile resells the O2 mobile network. You can check O2's mobile coverage online -- but Some of its more expensive Xtra plans include roaming at no extra charge The rest of its tariffs offer roaming for £2 a day. Eight-day and 15-day passes are available for £1 a day. Roaming; Tesco Mobile customers can use their phone in EU countries at no extra charge. 4G & 5G; All Tesco Mobile SIM only deals include 4G and 5G as standard, providing you have a compatible At Tesco Mobile, we're excitedly anticipating the opportunity to bring you irresistible offers on the latest smartphones, exclusive pay monthly plans, and must-have accessories. Although the excitement of Black Friday 2023 has concluded, the thrill of scoring incredible deals is far from over. Our Christmas Deals are live now with Clubcard Prices. Visit tescomobile.com. Visit Sky.com. "Tesco Mobile are the better roaming network for now. However, we’ll have to wait and see what their roaming charges look like once they bring them out. Sky’s worldwide roaming is better, but Tesco’s better EU roaming gives them the edge here." Compare pricing and deals. If you’re travelling outside the EU, you won’t be able to use your UK allowances. If you use your mobile data outside of the EU you will be charged up to £12.50 per Megabyte, depending on the country you’re in. For more information, including calls and text message charges visit Roaming Costs. 1. Turn off roaming. Your first mistake could be that you've forgotten to switch off mobile roaming in your phone's settings. This means you're liable to be charged roaming fees from the moment you arrive in the destination country. Keep roaming switched off in your phone settings until you really need it. 2. Here’s what you need to know. When the UK left the EU, the big four networks stated they had no plans to reintroduce European roaming fees. That plan has changed in 2021, with Vodafone, Three and EE all now making changes to their policies for using your UK mobile plan abroad. Depending on which network you’re with (and whether you travel VOcuQb.