12 GB
Data
30 days
Validity
$12.99
$1.08/GB
Three eSIM United Kingdom 2026: Promo Code, Data Plans & Prices
Three eSIM United Kingdom 2026: promo code, plans and prices. How much does it cost? Rates by days and GB, from the cheapest to the largest data package.
Traveling to more than one country? Add it to the search.
Updated Nov 9, 2026
Three plans and prices for the United Kingdom
Three for the United Kingdom FAQ.
Is there a Three promo code for the United Kingdom?
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Yes. Use our code when you buy a UK plan on MobiMatter. Enter it at checkout.
How much does the cheapest Three eSIM for the United Kingdom cost?
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The cheapest Three eSIM for the United Kingdom costs $12.99 and gives you 12 GB for 30 days. It's the global eSIM, which also works in other countries. We recheck prices daily, so this price is up to date. You can buy it on MobiMatter, the eSIM marketplace that sells Three plans.
Does Three work in the United Kingdom?
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Yes, Three works in the United Kingdom on its regional and global eSIMs. If your eSIM is installed but won't connect after you land, open your phone's settings and turn on data roaming for it. Your home SIM can stay as it is.
How much is a Three eSIM for the United Kingdom for 7, 15 or 30 days?
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On plans that include the United Kingdom, a 30-day Three plan starts at $12.99 for 12 GB. Three has no 7- or 15-day plan for the United Kingdom.
Does Three have an unlimited data eSIM for the United Kingdom?
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No, Three has no unlimited plans for the United Kingdom, so every plan comes with a set amount of data. Its plans run at full speed with no daily limit.
What is Three, and is it good for the United Kingdom?
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Three eSIMs are sold through MobiMatter, an eSIM marketplace, with plans covering 99 destinations.
How much does 1 GB of data cost with a Three eSIM in the United Kingdom?
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With Three, 1 GB in the United Kingdom can cost as little as $0.83 on the global eSIM, which has 36 GB for 30 days.
Does Three have 5G in the United Kingdom?
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Yes, 2 of Three's 9 plans for the United Kingdom have 5G, so check the plan details before you buy. Your phone needs to support 5G too: on iPhone, that means an iPhone 12 or newer.
Can I use a Three eSIM as a mobile hotspot in the United Kingdom?
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Yes, every plan from 3 lets you share data through a personal hotspot.
Does Three have a phone plan with a number for the United Kingdom?
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No, the UK plans from 3 are data only, so your home number stays on your main SIM. You can still call and message people through WhatsApp or other apps.
Can I buy a Three eSIM before my trip to the United Kingdom and use it later?
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Yes, you can buy it ahead, but install it within 2 months of purchase. The days start counting as soon as you install the eSIM, so install it shortly before your trip.
Can I top up a Three eSIM?
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Yes, you can top up a 3 eSIM in the MobiMatter app or on the MobiMatter site, with no new QR code. A top-up is a new package with its own days, and it doesn't extend the old one.
Does Three have a global eSIM that works in the United Kingdom?
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Yes, Three has 2 regional plans that cover the United Kingdom and other countries, plus 7 global plans. These keep you online as you cross borders. Three has no UK-only plan, so each of its eSIMs here also works in other countries.