United Kingdom eSIM plans compared

Which plan size fits your trip to United Kingdom

Start with how much data you want to buy, then match the validity to your trip. Yesim's 1 GB plan costs US$3.00 and lasts 30 days, the lowest entry price in our price table. Saily's 1 GB plan costs US$4.49 and lasts 7 days. A longer validity period does not give you more data.

Compare providers again when you move to a larger allowance. Saily lists 10 GB for 30 days at US$18.99, while Yesim lists 10 GB for 30 days at US$19.20. At 20 GB for 30 days, Yesim costs US$26.40 and Saily costs US$30.99.

Yesim's 30 GB plan for 30 days costs US$33.60, or US$1.12 per GB, the lowest price per GB in our table. That makes it worth considering if you want that allowance, but a lower unit price is not a reason to buy data you do not expect to use.

If you prefer to add data later, Saily says its prepaid plans support top-ups. Airalo says top-ups are available for many eSIMs, with available packages shown before and after purchase. Check the specific plan rather than assuming every purchase can be extended.

Unlimited plans and their limits

Compare unlimited plans over the same travel dates. Airalo lists 7 days at US$27.00, compared with Holafly at US$27.50. For 30 days, Airalo costs US$69.00 and Holafly costs US$76.50. For a short stay, Nomad lists an unlimited 3-day plan at US$11.00.

Unlimited data does not settle the speed question. Holafly says network operators can apply a Fair Usage Policy in rare cases, temporarily reducing speed for no more than 1 day. Holafly says the restriction resets the following day.

Hotspot access is a separate limit. Holafly allows you to share 1 GB per day, so its unlimited phone data does not mean unlimited data for connected devices. Saily states that hotspot access has no restrictions, but a fixed-data plan still has its purchased allowance.

Yesim says data speed may be limited under the network operator's Fair Usage Policy and that hotspot access depends on the operator. Consider those qualifications alongside its lower-priced fixed-data options.

Networks and coverage

Use the network names as a comparison point, not a promise of identical coverage or speed everywhere. These are the names shown on the UK provider pages:

Holafly says its UK eSIM covers England, Scotland, Wales, and Northern Ireland without switching eSIMs. Nomad warns that coverage may exclude overseas territories and asks you to confirm with support before buying. It also says network availability and speed can vary by location and time of day.

For a trip beyond the UK, Airalo lists a European Union and United Kingdom option at US$4.00. Saily lists Europe coverage across 35 countries from US$4.99 and Global coverage across 121 countries from US$8.99. Compare those regional options separately from the UK plans, and check that your other destinations are included.

• Airalo names EE and identifies it as the eSIM's primary network.
• Holafly names Orange UK, T-Mobile UK, H3G UK, VirginMediaO2 UK, and Vodafone UK.
• Nomad names Hutchison 3G, EE, and Vodafone.
• Yesim lists SwitchLess Networks and says it automatically switches to the fastest available network.
• Saily's UK page does not name a network; it says coverage quality depends on local network providers.

Before you fly

Check your phone's eSIM support before buying. The provider pages we checked do not give a phone compatibility list. Then read the installation and activation instructions for your chosen provider, because installing an eSIM and starting its validity are not always the same action.

Airalo says you can install in advance with a stable internet connection, including while outside the coverage area. Holafly says its plan activates when the eSIM connects to a supported network.

Saily says activation happens automatically at your destination when its eSIM is turned on and roaming is enabled. Saily gives plans a 180-day activation period. Nomad allows activation within 60 days of purchase; after that, the plan automatically activates and its expiry starts.

Yesim lists activation within 180 days of purchase, with validity beginning when you connect to a compatible network. If you need traditional calls or texts, check the product type too: Holafly's UK eSIM is data-only, while Saily offers separate phone-number, text-message, and minutes plans.