Best eSIM for United Kingdom in 2026
GBCompare eSIMs for the United Kingdom: EE for coverage, Three for 5G speed.
The cheapest eSIM for United Kingdom right now is Yesim — $0.49 for 500 MB over 1 days.
Prices updated 8/12/2026
Best for budget
Yesim$0.49
500 MB · 1d→
Best for heavy users
Yesim$3.26
∞ · 1d→
Best for short trips
Yesim$0.49
500 MB · 1d→
Best for long stays
Yesim$2.72
1 GB · 30d→
All plans for United Kingdom
155 plans
What you need to know about eSIMs in United Kingdom
The UK has four major networks — EE, O2, Three and Vodafone. EE is generally considered the best overall network in 2026, with the widest 4G coverage (99%), the most extensive 5G rollout (100+ towns and cities) and the fastest average 4G speeds. Three stands out for the fastest 5G speeds on the market and competitive plans. O2 leads on customer service, and Vodafone remains a solid choice for international business travelers thanks to its extensive roaming agreements.
Worth knowing for European travelers: since Brexit, free EU roaming is no longer automatically guaranteed for UK visitors, and EU visitors coming to the UK don’t always get preferential rates from their home carrier either, depending on the operator. A dedicated eSIM sidesteps that uncertainty entirely. Compare Airalo, Saily, Holafly and others above by real price-per-GB — all four UK networks are reachable through wholesale agreements.
Frequently asked questions
- Which network should I pick for London?
- EE has the widest 4G coverage and the most extensive 5G rollout in the UK. Three offers the fastest 5G speeds if speed matters more than coverage breadth.
- Does my EU plan work in the UK since Brexit?
- Not automatically. Since Brexit, free EU roaming to the UK is no longer guaranteed by law, and some carriers charge extra. A dedicated eSIM avoids that uncertainty.
- How much data do I need for a UK trip?
- 1–3GB per week covers maps, messaging and social media. Budget 5–10GB for streaming or remote work.
- Can I keep my number with a UK eSIM?
- Yes. An eSIM adds a dedicated data line; your number, calls and WhatsApp keep working normally.
Guides for this destination
Guides
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