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United Kingdom eSIM: prepaid 5G data for travellers

Connects to O2 on 5G/4G eSIM in United Kingdom. Install it before you fly, switch it on when you land. No shop queue, no passport, no roaming bill.

★★★★★5.0 · 8 verified reviews33 plans from $1.99Works on iPhone XR+ & Android

Instant QR by email Validity starts on arrival Keep your own number Hotspot included

3-day plans from$1.99≈ $0.66 per day

Choose your United Kingdom eSIM plan

Prices updated 7 Nov 2026

1 · How long are you in United Kingdom?

Plan days start at your first connection in United Kingdom — buying or installing early costs you nothing.

2 · How much data?

Unlimitedtotal$16.997 daysO2, EE7 Days$2.43 / day

1GBtotal$2.997 daysEE7 Days$0.43 / day

3GBtotal$4.997 daysT-Mobile, Telenor, Sunrise, Primetel, O2, Telia, TDC, Orange, Tele2, Elisa, Bouygues, EE, Vodafone, H3G, Bite, Odido, KPN, A1, KyivStar, Beeline, MTS7 Days$0.71 / day

5GBtotal$6.997 daysT-Mobile, Telenor, Sunrise, Primetel, O2, Telia, TDC, Orange, Tele2, Elisa, Bouygues, EE, Vodafone, H3G, Bite, Odido, KPN, A1, KyivStar, Beeline, MTS7 Days$1.00 / day

1GBtotal$6.997 daysORANGE, Vodafone, Wind, KyivStar, T-Mobile, Telenor, Sunrise, Primetel, O2, Telia, TDC, Orange, Tele2, Elisa, Bouygues, EE, Bite, A1, H3G7 Days$1.00 / day

10GBtotal$9.997 daysT-Mobile, Telenor, Sunrise, Primetel, O2, Telia, TDC, Orange, Tele2, Elisa, Bouygues, EE, Vodafone, H3G, Bite, Odido, KPN, A1, KyivStar, Beeline, MTS7 Days$1.43 / day

2GBtotal$11.997 daysO2, EE7 Days$1.71 / day

3GBtotal$15.997 daysO2, EE7 Days$2.28 / day

20GBtotal$15.997 daysO2, EE7 Days$2.28 / day

Sizes marked only with this trip length hide automatically when you change the days. Running out mid-trip? Top up in the app without a new QR code.

QR code in under 60 seconds

Emailed instantly, and kept in your account and in the app.

Your number stays live

Bank codes and calls keep working on your home SIM.

No ID, no shop queue

Local prepaid SIMs need a passport and a counter visit. This needs neither.

United Kingdom eSIM prices at a glance

All 33 plans, tax included

Every United Kingdom eSIM plan by data allowance and trip length
Data	3 days	7 days	15 days	30 days
1GB	$1.99$0.66/day	$2.99$0.43/day	$12.99$0.87/day	$25.99$0.87/day
2GB	$5.99$2.00/day	$11.99$1.71/day	$23.99$1.60/day	—
3GB	$3.99$1.33/day	$4.99$0.71/day	$5.99$0.40/day	$6.99$0.23/day
5GB	$5.99$2.00/day	$6.99$1.00/day	$7.99$0.53/day	$9.99$0.33/day
10GB	$7.99$2.66/day	$9.99$1.43/day	$12.99$0.87/day	$14.99$0.50/day
20GB	—	$15.99$2.28/day	$17.99$1.20/day	$18.99$0.63/day
30GB	—	—	$25.99$1.73/day	$29.99$1.00/day
50GB	—	—	—	$37.99$1.27/day
Unlimited	$8.99$3.00/day	$16.99$2.43/day	$36.99$2.47/day	$71.99$2.40/day

Coverage in United Kingdom

Local networks

Your United Kingdom eSIM connects to O2. The phone selects the strongest available signal automatically.

O2Primary network

5G/4G eSIM in United Kingdom.

5G/4G eSIM

United Kingdom5G/4G eSIM

Network	5G/4G eSIM
Carriers	O2
Coverage	United Kingdom
Activation	Automatic, activates when connected to a mobile network. Be sure to activate within 30 days after purchase. The Calendar Day in TimeZone UTC +08:00 is applied on the validation date.
Device	eSIM-capable, carrier-unlocked phone.

Network details are supplied by the carrier and can change by region.

How to install and activate your United Kingdom eSIM

About 3 minutes

Settings → Mobile Service → Add eSIM

Do this on Wi-Fi before you fly. Tap “Use QR code” and point the camera at the code in your email.

Label it “United Kingdom” and leave it switched off

Turn off “Turn On This Line” so nothing connects while you are still at home.

In the air: turn the line on, then pick it for mobile data

Settings → Mobile Service → Mobile Data → United Kingdom. Leave your home line as the default for calls and SMS.

Landing in United Kingdom?

Install before boarding and switch the line on after landing — no SIM vending machine, no counter queue.

Step-by-step guide →

United Kingdom eSIM vs a local SIM vs roaming

eSIM vs SIM vs roaming

Most travellers compare three options. The differences that actually bite are paperwork, wasted days and what happens when you cross into a neighbouring country mid-trip.

	RoamiData eSIM	Airport SIM	Home-carrier roaming
Getting it	Online, QR in a minute	Queue at the airport counter	Nothing to install
ID needed	None	Passport, in person	None
Paid days	Only the days you pick	Fixed packs, often 30 days	Billed per day or per MB
Typical cost	From $1.99	Varies by airport	Depends on your home carrier
Cross-border	Add a regional pass, keep the same eSIM	Buy a new SIM per country	Works, but usually throttled
Your number	Stays live for calls and SMS	Swap the tray, lose it	Stays live
If it breaks	24/7 chat, refund if it never connects	Back to the counter	Call your carrier

Roaming rates vary by carrier; check before you travel. Check your own carrier before you travel — some include United Kingdom in a regional bundle.

Four things worth setting up before you land

Install over Wi-Fi

Add the eSIM at home on a stable connection. The QR code arrives by email right after purchase.

Offline maps

Download the map for your destination over hotel Wi-Fi before you set off.

Keep your number

This is a data-only eSIM, so calls and SMS stay on your regular SIM.

Watch your data

Streaming and large uploads use data fastest. Top up from your account if you run low.

What travellers say about the United Kingdom eSIM

All 8 reviews →

5.0★★★★★6 verified reviews

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★★★★★ 2years ago

“RoamiData has wide global coverage and is fast to install. I have been to 20 countries and regions and have always used it. It is really safe and convenient. I will still choose to recommend it to my friends in the future.”

Dilusha Gimhan2years ago

★★★★★ 2years ago

“RoamiData covers more than 200 countries and has a lot of data plans. I have used it to go to many places. The network is very fast, the customer service is always online, and the service is very good.”

well-proportioned2years ago

★★★★★ 2years ago

“In the past, I always had to prepare a physical card and need to change a card in each country, which was really inconvenient. This time, a friend recommended me RoamiData Thailand’s data package. The price is very affordable. I will use it when traveling in the future.”

mountains and rivers2years ago

★★★★★ 2years ago

“I have been using RoamiData for many years. It feels very good and the service is excellent. I recommend it to my friends around me.”

Maneswar Pradhan2years ago

★★★★★ 2years ago

“I originally planned to start international roaming for a day, but I didn’t expect that the roaming charges would be as much as the cost of my hotel stay. It was too expensive, so my friend recommended RoamiData to me. I followed the prompts and eSIM, and purchased data according to my needs. So convenient!”

smug2years ago

★★★★★ 2years ago

“I highly recommend RoamiData. The Internet speed is super fast and it is the most convenient application I have ever used. I recommend it to everyone.”

elegant2years ago

United Kingdom eSIM questions, answered

What is eSIM?

eSIM stands for embedded SIM card, which is a standardized digital SIM card technology. It enables you to activate and manage mobile plans without the need for a physical SIM card. eSIM significantly enhances network connectivity, providing users with enjoyable travel experiences. At RoamiData, you can choose the perfect eSIM package for your needs and have a wonderful time!

When should I purchase and activate eSIM?

You can purchase eSIM at any time, but please activate the eSIM service after arriving at United Kingdom. Once successfully activated, the activation date becomes the start date of your plan. To avoid unnecessary financial loss, it's essential to activate eSIM only after reaching United Kingdom. We recommend completing the purchase before reaching United Kingdom. You will receive an email containing a QR code for activation. Upon arrival at United Kingdom, you can activate the QR code and start using the eSIM service.

Can I buy eSIM before reaching United Kingdom?

Certainly, you can purchase an eSIM data plan before reaching United Kingdom. Note: Please avoid activating the eSIM service by enabling data roaming for this eSIM before reaching United Kingdom. Instead, you can activate the eSIM after reaching United Kingdom by scanning the QR code received from your purchase using the free Wi-Fi network available at the local airport.

Can I activate eSIM before reaching United Kingdom?

It's not recommended because once successfully activated, the activation date becomes the start date of your plan. To avoid unnecessary financial loss, it's essential to activate eSIM only after reaching United Kingdom.

If I purchase eSIM in advance, will it activate automatically upon reaching United Kingdom?

No, it won't. You'll need to manually scan the QR code in the email after reaching United Kingdom to activate and use the eSIM data plan."

Will we receive an eSIM package?

An eSIM is a digital SIM card and therefore does not contain any physical packaging. After placing your order, you will receive an email containing a QR code to activate your eSIM.

Can I use the same eSIM card on multiple devices?

No, you cannot. Once the eSIM is successfully activated on one device, it cannot be used on another device. If you want to use the data plan of this eSIM on other devices simultaneously, you can achieve this through the hotspot feature for sharing data.

Can I use a physical SIM card and an eSIM at the same time?

It depends on your device. If your device supports dual SIM, then you can use two SIM cards simultaneously; otherwise, you cannot.

Can I use my eSIM outside United Kingdom?

No, our eSIMs only work with local cellular networks, so you can only connect to the internet within the borders of United Kingdom.