Free Tool · 2026
Best SIM & eSIM for UK Tourists
Find the right UK data plan for your trip — based on your data needs, trip length and phone type. Compare eSIM, physical SIM and roaming.
Prices are approximate 2026 estimates. Always check providers directly for current prices.
How It Works
Tell Us About Your Trip
Phone type, trip length, data needs, and whether you need a UK phone number.
Get Personalised Options
We recommend the best mix of eSIM, physical SIM and roaming for your specific case.
Compare & Choose
See pros and cons of each option with estimated costs, then buy before or after you arrive.
UK Data Options for Tourists
Quick comparison of the main choices.
| Option | Typical Cost (7 days) | Best For |
|---|---|---|
| eSIM (Airalo, Holafly, Saily) | £5-£25 | Most tourists — easiest, cheapest, no shop visit |
| Physical SIM (Three, EE, Vodafone) | £10-£30 | Longer stays, need UK number, older phone |
| Home Plan Roaming (US carriers) | £50-£100+ | Short trips, business travellers with corporate plans |
| Free WiFi Only | £0 | Very short trips, light users (limited) |
Frequently Asked Questions
Can I use my US phone in the UK?
Yes — most modern US phones work in the UK. Check that your phone is unlocked and supports the UK's GSM/4G/5G bands. If you have a newer phone with eSIM support (iPhone XS or later, Samsung S20 or later, Google Pixel 3 or later), you can use a UK eSIM without needing a physical SIM.
What's the cheapest way to get data in the UK?
For most tourists, an eSIM from a provider like Airalo, Holafly or Saily is the cheapest and easiest option. Prices start from about £5 for 1GB, £15 for 10GB, or £25 for unlimited data for 7 days. A physical UK SIM from Three, EE or Vodafone is also good value if you're staying longer than 2 weeks.
Is it better to get a UK SIM or use my home plan's roaming?
A UK SIM or eSIM is almost always cheaper than your home plan's international roaming, unless you have a specific plan that includes UK roaming. US carriers typically charge $10-15 per day for international roaming; a UK eSIM costs around £5-£25 for the whole trip.
What's the difference between a SIM and an eSIM?
A physical SIM is a small plastic card you insert into your phone. An eSIM is a digital SIM built into your phone — you activate it by scanning a QR code or using an app. eSIMs are typically cheaper and easier because you can activate before you travel, and don't need to visit a shop.
Which UK network has the best coverage?
EE has the best overall coverage in the UK (especially in rural areas). Vodafone and Three are also excellent in cities and most towns. O2 is good in cities but weaker in rural Scotland and Wales. For tourists staying mostly in London, Edinburgh, Manchester and other cities, any major network works well.
Can I keep my WhatsApp number with a UK eSIM?
Yes. If you use an eSIM alongside your home SIM (dual SIM mode), you can keep your WhatsApp number on your home SIM while using the eSIM for data. This is how most travellers use eSIMs — home SIM stays active for calls/texts, eSIM handles data.
How much data do I need for a UK trip?
For light use (maps, messaging, occasional browsing), 3-5GB per week is plenty. For moderate use (social media, video calls), 10GB per week. For heavy use (streaming, lots of video), unlimited or 20GB+ per week is recommended.
Do UK SIMs work in Scotland, Wales and Northern Ireland?
Yes — all major UK networks cover Scotland, Wales and Northern Ireland. Coverage can be weaker in remote areas like the Scottish Highlands, parts of Snowdonia and rural Northern Ireland, but EE tends to have the best rural coverage.