Best eSIM for United Kingdom
6,631 live plans from 62 providers, ranked on what a gigabyte actually costs rather than on the sticker price. Checked 13 October 2026
This page is not indexed yet: it has not met the coverage and editorial thresholds published in our methodology.
Our picks
Four plans, four different jobs
One top ranked plan and three answers to the questions travellers actually ask. A card marked "Editor's pick" was chosen by a person and carries their reasoning; "Top ranked" is simply the top of our published formula, which nobody chose. Every one is checkable against the table below in a click.
DUDEADVICE5
ESIMDUDE
AFFINCO
Verified codes
18 codes that work in United Kingdom
Each of these was checked by a person, and the date it was checked is published on the deals page. Apply at the provider's checkout, on top of the prices below. The best on file here is 20% off.
ESIMADVICE20
LOTSOT10
ESIMADVICE15
ESM15
ESIMTWEAKS
AFFINCO
ESIMTWEAKS10
AFFMAVEN10
ESIMTWEAKS
ESIMADVICE
ESIMADVICE10
AFFINCO
ESIMDUDE10
ESIMTWEAKS
ESIMADVICE
DUDEADVICE5
ESIMADVICE
ESIMTWEAKS10
Each code carries its own check date on the deals page. Discounts apply to the provider's price and are not reflected in the table below.
Coverage
Whose network you are actually on
An eSIM is a reseller agreement, not a network. These are the host operators the plans in United Kingdom attach to, counted across every plan we sampled.
Host operator data comes from the providers' own published coverage. Where a feed lists the same operators against every country in a multi-country bundle, we discard that attribution rather than credit a network it does not describe.
By provider
Which providers use which networks
How many of each provider's plans we sampled in United Kingdom, what they average per gigabyte, and which operators they ride.
SimBye
17
£0.61
O2
Vodafone
EE
3
0%
RedEx eSIM
162
£0.76
Not published
0%
Roaming4You
6
£0.77
O2
3
EE
0%
Revo eSIM
6
£0.82
Not published
0%
MicroeSIM
452
£0.82
EE
3
Vodafone
O2
100%
nadanada
8
£0.82
Not published
0%
FlySimio
16
£0.86
Not published
100%
Stellar eSIM
253
£0.88
O2
3
T-Mobile
91%
BambooSIM
29
£1.05
Not published
100%
eSIM SIGNAL
120
£1.10
Not published
0%
eSIMPal
16
£1.14
Not published
0%
TailSim
28
£1.24
O2
3
T-Mobile
50%
RedSim
91
£1.26
3
EE
O2
Vodafone
93%
eSIM Dog
1,059
£1.29
Vodafone
3
O2
EE
29%
OHAYU
12
£1.47
O2
Vodafone
EE
100%
globalyo
40
£1.47
Not published
0%
AlpineSIM
302
£1.47
O2
3
Vodafone
EE
100%
Connect Me Guru
86
£1.49
Not published
93%
AirPlans eSIM
97
£1.57
O2
3
Vodafone
EE
91%
LotsoTravel
137
£1.57
Vodafone
3
100%
Host operator data comes from the providers' own published coverage. Where a feed lists the same operators against every country in a multi-country bundle, we discard that attribution rather than credit a network it does not describe.
Local knowledge
What to know about United Kingdom
The United Kingdom has the single cheapest gigabyte we have found anywhere — 0.13 USD on the best-value plan currently listed. The median is 0.99, so that headline figure is an outlier rather than the going rate, and it is worth checking what the cheap plan actually restricts before assuming it fits.
Supply is deep: 1,472 plans from 10 providers, with allowances averaging nearly 19 GB over 25 days. Only a third advertise 5G, which is low for a market with this much 5G infrastructure, and reflects what the resellers publish rather than what the networks carry. Hotspot is permitted on 92% of plans. No registration is required, so a plan bought this morning can be installed and running before you land.
Before you buy
How to choose
Match the allowance to the trip, not the price
The average plan sold here is 31.8 GB over 29 days. Buying the cheapest plan and topping up twice usually costs more than buying the right size once — check whether the plan supports top-up before relying on it.
Treat "unlimited" as a threshold
656 plans here are sold as unlimited. Almost all mean full speed up to a fair-use threshold and throttling after it. Compare those on price per day; a price per gigabyte for an unlimited plan is a number with no denominator.
Check the network, not the brand
57% of plans here advertise 5G, but the network belongs to a local host operator. The provider table below shows which operators each reseller actually rides — that is what decides coverage once you leave the city.
Know when the clock starts
Some plans start counting at purchase, some on install, some on first connection at the destination. A seven-day plan bought three days early is a four-day plan if it starts at purchase. Where a provider does not publish the trigger, we mark it unknown rather than guess.
Setup
How to install
Most phones released since 2019 do. Dial *#06# — if an EID number appears alongside the IMEI, the handset has an eSIM. A carrier-locked phone may still refuse a second profile.
Buy while you still have reliable internet. Whether to install immediately depends on when the plan's clock starts — check the activation trigger on the plan you chose.
The provider emails a QR code. On iOS: Settings → Mobile Service → Add eSIM. On Android: Settings → Network & internet → SIMs → Add. Keep the code; some providers let you reinstall with it, others do not.
This is the step people miss. A travel eSIM is technically roaming on a host network, so data roaming must be enabled for that line — and turned off for your home line, unless you want a bill.
Transparency
How we rank this market
Collect
We read 6,631 live plans from 62 providers directly from their published catalogues, and normalise every allowance to integer megabytes and every price to integer minor units.
Separate
Unlimited and pay-per-GB plans are excluded from every median and percentile. A throttling threshold is not an allowance, and mixing the two makes a gigabyte look cheaper than it is.
Rank
The default order is a published formula: value percentile, feature completeness, data freshness, provider accuracy, coverage fit, first-party ratings and promo availability. Commission weight is zero, and no payout data reaches the ranking code at all.
Refresh
Prices are re-read continuously and this page was last recomputed on 13 October 2026. A sync whose numbers move implausibly is rejected rather than published.
Questions
United Kingdom eSIM questions
How much does an eSIM for United Kingdom cost?
Plans start at 0.21 GBP. We track 6,631 plans from 62 providers, and the median works out at 1.03 GBP per gigabyte once unlimited and fair-use plans are excluded from the calculation.
Which eSIM gives the best value in United Kingdom?
The lowest price per gigabyte currently available is 0.04 GBP, against a market median of 1.03 GBP. Sort the table by "Best value" to see the full ordering — that sort ignores our editorial ranking entirely and uses price per gigabyte alone.
How much data do I need for United Kingdom?
The average plan sold for this destination carries 31.8 GB over 29 days, which is what most travellers buy rather than what most travellers use. Maps, messaging and occasional browsing run well under 1 GB a week; video streaming is what moves you into the larger tiers.
Do eSIMs support 5G in United Kingdom?
57% of the plans we track advertise 5G here. Note what that figure is: it is the share of plans that *claim* 5G, not a coverage guarantee. The network you actually attach to belongs to a local host operator, not to the reseller, so real-world speed depends on their build-out in United Kingdom rather than on the plan you buy.
Can I use a personal hotspot with an eSIM in United Kingdom?
63% of plans here state that tethering is allowed. Where a provider does not say, we record it as unspecified rather than assuming yes — tethering is most often restricted on plans marketed as unlimited, which is exactly where people expect to be able to share a connection.
What does "unlimited" actually mean on these plans?
Almost always a fair-use threshold followed by throttling, not uncapped data. 656 plans here are marketed as unlimited. We show a price per gigabyte for those only where the provider publishes the full-speed threshold, and we exclude every unlimited plan from the median — a throttling threshold is not an allowance, and mixing the two distorts what a gigabyte appears to cost.
When does the validity period start?
It depends on the plan, and it is worth checking. Some start counting at purchase, some on installation, and some only when the eSIM first connects to a network at your destination. A seven-day plan bought three days before you fly is a four-day plan if it starts at purchase. Where a provider publishes the trigger we show it; where they do not, we mark it unknown rather than guessing.
Keep looking
More destinations in this region
Other markets in the same region, listed alphabetically. If you are crossing borders, check whether one regional plan beats buying each of these separately — it usually does on data you will not finish, and rarely on data you will.