eSIM for London 
- Price
- from $1.29
- Data
- 500 MB – 50 GB or unlimited
- Validity
- 1–180 days
- Speed
- 4G LTE / 5G
- Host networks
- 3, EE, O2
- Coverage
- London
Duration
Choose your package
Unlimited data · 3 Days ×1
$3.00
Does my phone take an eSIM? Check now
Dial *#06# on your phone. If you see an EID number, your phone takes an eSIM. Most phones sold since 2019 do.
Not sure it works on your phone? Check compatibilityHow do you install and activate it?
- 1
Buy before you fly
Pick a country and a data size; pay with Apple Pay, Google Pay or card.
- 2
Open the email
Your QR code arrives in minutes. Scan it while you still have wifi.
- 3
Land connected
Switch data to Viasimo on arrival. Your own number keeps working for calls.
Which networks does the London eSIM use?
Host networks: 3 / EE / O2
Your eSIM picks one automatically; you do not choose or switch between them.
- Data
- 500 MB – 50 GB or unlimited
- Validity
- 1–180 days
- Speed
- 4G LTE / 5G
- Hotspot / tethering
- Supported on most devices
- Activation
- Starts when you first connect in your destination
- Speed management
- Full speed to the plan's limit, then 512 Kbps
- Top-ups
- Add more data from your account, before the plan expires
- Text messages (SMS)
- Data only: use an app for verification codes
- Unused validity
- 180 days before it must be installed
How much data do you need?
The allowances below are our sizing recommendations, not measurements. The plan beside each one is the cheapest option on this page that covers it.
| You are | Plan for | Cheapest plan that covers it |
|---|---|---|
| LightMaps, messaging and the occasional lookup | About 1 GB a week | $1.591 GB, 7 days |
| TypicalMaps, social, photos and some browsing | About 3 to 7 GB a week | $4.295 GB, 30 days |
| HeavyVideo streaming, video calls and uploads | 10 GB a week or more | $6.00Unlimited, 7 days |
| Working or sharingTethering a laptop, calls and cloud sync | 20 GB a week or more | $6.00Unlimited, 7 days |
eSIM, local SIM or roaming?
Charged per day
Your carrier roaming
Queue and plastic
A SIM at the airport
$1.29
Viasimo, one bundle
Only the Viasimo figure is a price: it comes from today’s live catalog. The other two rows are directional, not quoted rates.
About this eSIM
Unlimited runs at full speed up to a fair-use limit, then continues slower.
Before you travel to United Kingdom
Do I have to register a SIM here?
The UK has no SIM-registration requirement — you can buy a local SIM with no ID at all. A travel eSIM is simply the more convenient option, not a way around a rule.
Local SIM-registration rules apply to buying a SIM in the country. A travel eSIM is a foreign profile roaming onto the local network, so you are not registering anything locally and there is no counter to queue at.
Checked 29 July 2026 against etavisauk.org . Rules change — verify anything that affects your trip.
Important to know
- This is a data-only eSIM. It carries no calls or SMS on its own number.
- Your existing number stays on your primary SIM, so calls and verification texts keep working.
- Your phone must support eSIM, and some carrier-locked phones cannot install one.
- Signal varies with location, terrain, congestion and your handset. Dense urban areas are consistently better served than remote ones.
- 5G only works where the host network has deployed it and your phone supports it. Everywhere else it falls back to 4G LTE.
- The eSIM selects a host network automatically. You cannot pick or switch between them.
- Unlimited plans run at full speed up to a fair-use limit, then continue at a reduced speed. Read the fair usage policy
Frequently asked questions
Does an eSIM work in London?
Yes. Your United Kingdom eSIM connects automatically the moment you arrive, with no roaming fees and nothing to set up at the airport. The host networks it can use are 3, EE, O2. Coverage runs on 4G LTE and 5G where the network has rolled it out, and falls back to 4G elsewhere.
Do I get 5G in London?
Yes, where it has been deployed. 5G runs on 3, EE, O2 in United Kingdom, and your eSIM uses it automatically on a 5G-capable phone, dropping back to 4G LTE outside covered areas. No country is covered everywhere, so 5G availability varies by location.
How much data do I need for London?
These are Viasimo's sizing recommendations, not measurements of your trip. Maps, messaging and the occasional lookup run to roughly 1GB a week. Streaming, video calls or tethering a laptop push that to 3-5GB a week, and uploading photos and video moves past it faster still. The data calculator on this site works it out from how you actually use your phone. Sizing one tier up costs less than topping up part-way through a trip.
Is an eSIM cheaper than roaming in London?
Usually, though it depends on your own carrier. A roaming day-pass is charged for each day it is active whether you use the data or not, while a prepaid bundle is one up-front purchase for a fixed amount of data. The gap widens on longer trips. Check your carrier's published rate for London before you fly rather than taking our word for it.
How do I install my eSIM?
After checkout we email you a QR code. On your phone, open Settings, then Cellular or Mobile data, tap Add eSIM, and scan the code. Installation takes under a minute.
When does my London eSIM activate?
Your plan activates automatically when you arrive and connect to a local network, so your validity period only starts once you land.
Can I keep my regular number?
Yes. The eSIM is data-only and runs alongside your physical SIM, so you keep your home number for calls and texts while using Viasimo for data.
Can I top up or extend my plan?
Yes. You can buy more data or extend your plan at any time from your account before it expires.
Does it support hotspot and tethering?
Tethering is supported on most devices, so you can share your connection with a laptop or other devices.
Information and verification
Each block below says what was checked and when. Anything we cannot date, we do not claim.
- Prices and plans
- Every price and allowance on this page is read from the live catalog, not typed in.
- Host networks
- The operator list comes from the network partner that carries this eSIM.
- Local rules
- SIM registration and device rules, checked against the sources below.Source: etavisauk.org
London eSIM prices
| Data | Price | Per day |
|---|---|---|
| Unlimited | $3.00 | $1.00/day |
| Data | Price | Per day |
|---|---|---|
| Unlimited | $4.29 | $0.86/day |
| Data | Price | Per day |
|---|---|---|
| Unlimited | $8.99 | $0.90/day |
| Data | Price | Per day |
|---|---|---|
| 3 GBBest value | $3.00 | $0.10/day |
| 5 GB | $4.29 | $0.14/day |
| 10 GB | $7.00 | $0.23/day |
| 20 GB | $14.99 | $0.50/day |
| Unlimited | $21.99 | $0.73/day |
| Data | Price | Per day |
|---|---|---|
| Unlimited | $41.99 | $0.70/day |
| Data | Price | Per day |
|---|---|---|
| Unlimited | $61.99 | $0.69/day |
Going to more than one country?
Regional plans that also cover United Kingdom
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