Best eSIMs for UK travellers

This is a neutral comparison of what to check. There are no affiliate links on this page. We do not name a best network, and we do not list prices. If we add links later, we may earn a commission when you buy, at no extra cost to you. That would not change the entry information on this site.

An eSIM is a digital SIM for mobile data. It has nothing to do with permission to enter a country. You still follow the visa or exemption rules. Start with the guide for the trip, for example Japan, Thailand, or the United States.

What to compare

Use the same questions for every provider. A higher price is not a sign that a product is approved by any government.

1. Will it work in the country, and on arrival? Roaming partners differ. A plan that names the country is not the same as a plan that works on the local network you will actually use, including outside the main city.
2. Data amount and hotspot. Maps and translations use data quickly. If you need to share the connection with a laptop, check that tethering is allowed.
3. How long it lasts. Match the validity to the stay, not to the visa-free maximum. A 30-day Thailand exemption and a 90-day Japan stay are different trips. See those guides for the immigration limit, which an eSIM cannot extend.
4. Voice and SMS. Many travel eSIMs are data only. Banking texts may still go to your UK number. Do not cancel that number if you need it for codes.
5. Your phone. It must be unlocked and eSIM-capable. A locked handset will not use another provider’s eSIM. Install before you fly if the provider allows it, and keep a screenshot of the QR code offline.
6. Who you are paying. Buy from a provider you can identify. Airport counters and websites that sit next to “visa application” adverts often add a service fee. That fee is not a government charge. The same warning applies to ESTA, eTA, ETIAS, the India e-Visa, and the Thailand arrival card: use the government address in the destination guide.

A simple way to choose

Write down the countries, the number of days, and whether you need a hotspot. Then compare two plans that both cover that list. Ignore review scores you cannot trace, and ignore any page that bundles a “visa” with the data plan. We have not tested handsets or networks for this article, so we are not awarding a best buy.

If you will be asked for proof of funds or a return ticket, a working phone does not replace those documents. Thailand’s figures are on the Thailand guide. Insurance, which is a separate purchase, is discussed in what to compare in travel insurance.

Last verified: 2026-10-16, for the entry pages linked above. No eSIM product was reviewed.

FAQ

Written by the Entry Visa Guide editorial team. Published 16 October 2026. Updated 16 October 2026.

UK passport destination guides · All explainers

Neutral comparison. There are no affiliate links on this page. If we add any later, we may earn a commission when you buy, at no extra cost to you. That would not change the entry information.