5G eSIM United Kingdom (UK) | O2

4.2
(686 reviews)
30K+ booked
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  • Receive your eSIM immediately
  • Supports TikTok & AI tools
  • Quality Guarantee – Refund before usage or if you experience issues
  • Access 24/7 customer support
  • Verify your device compatibility
Offers for you

Package options

Select options

Package type

Data per day

Data in total

SIM card validity

15 days

27 days

29 days

24 days

3 days

28 days

11 days

13 days

9 days

10 days

19 days

21 days

1 day

4 days

25 days

26 days

22 days

16 days

20 days

8 days

2 days

14 days

5 days

7 days

23 days

17 days

30 days

18 days

12 days

6 days

Data package

3GB

Unlimited

1GB

5GB

20GB

500MB

10GB

50GB

Service type

Data only

Product details

Validity 1-30 days

Internet speed 5G/4G LTE

Service type Data only

Coverage area All of UK (England, Scotland, Wales and Northern Ireland)

Data limit Unlimited Plans: 15 GB/day at full speed, then slows to 1 Mbps

Hotspot Sharing Yes

Local telecom operator O2 5G | Vodafone 5G | Three 5G

What to expect

What is an eSIM for UK?

An eSIM UK is a digital SIM card that lets you add a mobile data plan to your phone without needing a physical SIM. With a UK eSIM, you can stay connected as you travel across cities like London — no need to visit a SIM card store or worry about roaming fees.

How to Get Your UK eSIM?

  1. Download the Klook app
  2. Check device compatibility
  3. Select your destination and data plan
  4. Activate instantly via app or QR code
  5. Turn on data roaming to connect to the local network

Why Choose Klook’s eSIM for UK?

  • High-Speed Data: Reliable connectivity through top local networks like O2.
  • Instant Setup: Activate in 5 minutes — no physical SIM required.
  • Affordable Plans: Transparent pricing with no hidden expensive roaming fees.
  • Wide Compatibility: Works with 100+ eSIM-enabled devices.
  • Hotspot Sharing: You can easily share data with other devices.

Things to Know About UK eSIMs

1. How does eSIM UK work?

UK eSIM works by digitally adding a mobile plan to your device. Simply purchase a prepaid UK eSIM, install it through the Klook app or a QR code, and get connected as soon as you arrive. Hotspot and tethering are supported and you can easily add additional data linked to your main eSIM if you run out of data.

2. Is eSIM worth it for UK?

Definitely! An eSIM is the easiest way to stay connected while traveling in UK — no need to swap physical SIM cards. With Klook’s UK eSIM, avoid expensive roaming fees while enjoying fast and reliable coverage across London and beyond from O2 for a seamless travel experience.

3. Can you keep your primary SIM number with a UK eSIM?

Yes. Thanks to the dual SIM functionality of an eSIM, you can keep your local phone number. Your local SIM card stays in your phone, and you add the eSIM UK plan for internet access. This lets you enjoy data in UK without having to swap out your physical SIM card.

Terms & Conditions

Cancellation policy

  • Cancel before your eSIM connects for a full refund. If you face issues after activation, low usage qualifies for a full refund, while higher usage may qualify for a partial refund plus 10% extra in KlookCash. All refunds are at Klook’s sole discretion.

How to use

Activate your Klook eSIM before travel
Activate your eSIM before travel
Klook eSIM installation methods
Activate your eSIM via Klook in-app activation, scanning the QR code, or entering the SMDP+ details manually
Klook eSIM In-app activation
Click Add eSIM to device on your booking to start the installation. Don't worry, data and validity will only commence when you reach your destination
Klook eSIM In-app activation
Installation of your eSIM will start automatically
Klook eSIM iOS installation
Set up your Klook eSIM for travel on iOS
Klook eSIM installed
Your eSIM is ready for use! Usage and validity start only when the eSIM connects to an overseas network
Turn on Klook eSIM
Turn on Klook eSIM and select Klook eSIM for mobile data
Turn on Data roaming
Switch on data roaming at your destination to start using your eSIM
Klook eSIM connected
Your klook esim is connected! Track your data balance and validity through the Klook app

Additional information

  • For connection issues, please contact merchant via the following steps: Account > Bookings > eSIM booking > Top right contact merchant

Reviews

4.2/5
Based on 686 reviews

QUINTIN **

17 Apr
Highly recommended

Review for: Data per day · 15 days · Unlimited · Data only Book now

As always, klook eSIM never disappoints. I had a great experience using it while I was in Edinburgh but I notice when I was in Highlands of Scotland in the far North signal is quite weak but it’s ok I survive but then when I was in London Klook is reliable, seamless, and hassle-free all the way.

Helpful

Klook User

14 Oct 2025
Highly recommended

Review for: Data in total · 30 days · 10GB · Data only Book now

it’s a pleasant, easy to set and use, and way much much cheaper solution compared to my provider’s data prices. coverage area as advertised all over UK …we went from london to north (liverpool, manchester, glasgow, edinburgh) then to south (brighton) … and all without hiccups. best solution for travelers ….

Helpful

Mati *****************

1 Feb 2025
Highly recommended

Review for: Data in total · 30 days · 5GB · Data only Book now

An eSIM, or embedded SIM, is a digital SIM card that's built into a device. It allows users to activate a mobile plan without needing a physical SIM card. How does it work? An eSIM is installed into a device's eUICC chip during manufacturing. Users can activate their eSIM by scanning a QR code. Once activated, the eSIM connects to the network like a traditional SIM card. Users can change their mobile network operator without needing to swap out a physical SIM card.

Helpful

Mati *****************

9 Jan 2025
Highly recommended

Review for: Data in total · 7 days · 1GB · Data only Book now

An eSIM, or embedded SIM, is a digital SIM card that's built into a device, such as a smartphone, tablet, or smartwatch. It allows users to activate a cellular plan from their carrier without the need for a physical SIM card. Here are some benefits of using an eSIM: Convenience: You don't need to swap out physical SIM cards, so you don't have to worry about losing them. Flexibility: You can use multiple numbers on the same device, and you can switch between them easily. Space saving: The absence of a physical SIM card slot frees up space for other upgrade

Helpful

Mati *****************

2 Nov 2024
Highly recommended

Review for: Data in total · 7 days · 1GB · Data only Book now

You can activate your eSIM while you're setting up your iPhone if your carrier supports eSIM Carrier Activation or eSIM Quick Transfer. With eSIM Carrier Activation, your carrier assigns an eSIM to your iPhone when you purchase it. With eSIM Quick Transfer, you transfer the SIM from your previous iPhone to your new iPhone without contacting your carrier. With either method, to activate your eSIM during setup, turn on your iPhone and follow the instructions. An eSIM is an industry-standard digital SIM that allows you to activate a cellular plan from your carrier without having to use a physical SIM. You can install eight or more eSIMs on an iPhone and use two phone numbers at the same time.

Helpful

Mati *****************

2 Nov 2024
Highly recommended

Review for: Data in total · 7 days · 1GB · Data only Book now

You can activate your eSIM while you're setting up your iPhone if your carrier supports eSIM Carrier Activation or eSIM Quick Transfer. With eSIM Carrier Activation, your carrier assigns an eSIM to your iPhone when you purchase it. With eSIM Quick Transfer, you transfer the SIM from your previous iPhone to your new iPhone without contacting your carrier. With either method, to activate your eSIM during setup, turn on your iPhone and follow the instructions.

Helpful

Mati *****************

2 Nov 2024
Highly recommended

Review for: Data in total · 7 days · 1GB · Data only Book now

An eSIM is an industry-standard digital SIM that allows you to activate a cellular plan from your carrier without having to use a physical SIM. You can install eight or more eSIMs on an iPhone and use two phone numbers at the same time. You can activate your eSIM while you're setting up your iPhone if your carrier supports eSIM Carrier Activation or eSIM Quick Transfer. With eSIM Carrier Activation, your carrier assigns an eSIM to your iPhone when you purchase it. With eSIM Quick Transfer, you transfer the SIM from your previous iPhone to your new iPhone without contacting your carrier. With either method, to activate your eSIM during setup, turn on your iPhone and follow the instructions.

Helpful

Klook User

25 Jul 2025
Highly recommended

Review for: Data per day · 15 days · Unlimited · Data only Book now

easy to use, once i have arrrive at the london heathrow airport it automatically activated. highly recommended for travellers as you don’t need to go and buy a physical sim card.

Helpful

FAQs

What devices are compatible with eSIM?

It's clearly indicated if your device is compatible with eSIM products on the eSIM APP product page. You can still purchase the product even if your device isn't compatible with eSIM for other people or other devices.

Please note that most devices manufactured in China and Hong Kong are not compatible with eSIM.

It's recommended to search to see if your device is compatible with eSIM on the Internet.

eSIMs are not supported on locked iPhones. If you bought a device contracted with a telecom brand, it's usually locked from being connected to other telecom brands. (Please check with your operator for the details.)

Apple eSIM compatible devices:

iPhone

iPhone XR / XS / XS Max, iPhone 11 / 11 Pro / 11 Pro Max, iPhone SE 2 (2020), iPhone 12 / 12 Mini / 12 Pro / 12 Pro Max, iPhone 13 / 13 Mini / 13 Pro / 13 Pro Max, iPhone SE 3 (2022), iPhone 14 / 14 Plus / 14 Pro / 14 Pro Max, iPhone 15 / 15 Plus / 15 Pro / 15 Pro Max, iPhone 13 and 14 can have two eSIMs activated at the same time.

iPad (only iPads that can use 4G data)

iPad Pro 11″ (model A2068, from 2020), iPad Pro 12.9″ (model A2069, from 2020), iPad Air (model A2123, from 2019), iPad (model A2198, from 2019), iPad Mini (model A2124, from 20iPad, IPad 10th generation (model 2022)

Samsung eSIM compatible devices:

Samsung Galaxy S20 / S20+ / S20+ 5g / S20 Ultra / S20 Ultra 5G, Samsung Galaxy S21 / S21+ 5G / S21+ Ultra 5G, Samsung Galaxy S22 / S22+ / S22 Ultra, Samsung Galaxy S23 / S23+ / S23 Ultra / S23 FE (China and Hong Kong models don’t support eSIM), Samsung Galaxy S24 / S24+ / S24 Ultra, Samsung Galaxy Note 20 / Note 20 Ultra 5G, Samsung Galaxy Fold, Samsung Galaxy Z Fold2 5G / Fold3 5G / Fold4 / Fold5 5G, Samsung Galaxy Z Flip / Flip3 5G / Flip4 / Flip5 5G, Samsung Galaxy A54 (SCG21 (Japanese Model), SC-53D (Japanese Model), SM-A546B/DS (International Model), SM-A546S (Korean Model), SM-A546U1 (International Model))

Please note that some Samsung devices purchased in the USA, South Korea, China, and Hong Kong are not compatible with eSIM.

Google Pixel eSIM compatible devices:

Google Pixel 2 XL, Google Pixel 3 / 3 XL / 3a / 3a XL, Google Pixel 4 / 4a / 4 XL, Google Pixel 5 / 5a, Google Pixel 6 / 6a / 6 Pro, Google Pixel 7 / 7a / 7 Pro, Google Pixel 8 / 8 Pro, Google Pixel Fold

Please note that some Google Pixel 3 devices purchased in Australia, Japan, Taiwan, and most devices using the US or Canadian carriers are not compatible with eSIM.

Google Pixel 3a devices purchased in Japan, South East Asia, or from Verizon service are not compatible with eSIM.

Huawei e-SIM compatible devices:

Huawei P40 / P40 Pro and Huawei Mate 40 Pro

Oppo eSIM compatible devices:

Oppo Find X3 Pro / Find N2 Flip, Oppo Reno 5A, Oppo Reno 6 Pro 5G, Oppo Reno 9A, Oppo Find X5 / Find X5 Pro, Oppo A55s 5G

Sony eSIM compatible devices:

Xperia 10 III Lite / 10 IV / 10V, Xperia 1 IV / 1 V, Xperia 5 IV / 5 V, Xperia Ace III

Xiaomi eSIM compatible phones:

Xiaomi 12T Pro and Xiaomi 13 / 13 Lite / 13 Pro / 13T Pro

Motorola eSIM compatible devices:

Motorola Razr 2019 / 5G / 40 / 40 Ultra, Motorola Razr+, Motorola Edge+, Motorola Edge 40 / 40 Pro / 40 Neo, Motorola G52J 5G / 5G Ⅱ, Motorola G53J 5G, Moto G54 5G, Motorola G84

Sharp eSIM compatible devices:

AQUOS sense4 lite, AQUOS Sense 6s, AQUOS sense 7 / 7 plus, AQUOS wish, AQUOS wish 2 SHG08, AQUOS wish 3, AQUOS zero 6, Simple Sumaho 6, AQUOS R7, AQUOS R8 / R8 Pro

Rakuten eSIM compatible devices:

Rakuten Mini, Rakuten Big-S / Big, Rakuten Hand / Hand 5G

Honor eSIM compatible devices:

Honor Magic 4 Pro, Honor Magic 5 Pro, Honor 90, Honor X8

Vivo eSIM compatible devices:

Vivo X90 Pro, Vivo V29 Lite 5G (Europe), Vivo X100 Pro

Nokia eSIM compatible devices:

Nokia XR21, Nokia X30, Nokia G60 5G

How can I activate the eSIM directly from the Klook app?

  • Tap the “Activate” button and wait for the eSIM to get activated.
  • After activation, make sure the eSIM is installed on your device. You can check it from Settings > Cellular > SIMs.
  • You can name the eSIM in Settings > Cellular > eSIM > Cellular Plan Label.
  • Note: Be careful not to turn on the data roaming before arriving at your destination!
  • After arriving at the destination, please turn on eSIM data roaming and switch the cellular plan to this eSIM card to connect to the network.

How can I activate the eSIM with a QR code?

You can find the QR code from the booking details on the Klook app or on your Klook account.

The QR code should be visible next to the "Activate" button if your device is compatible with the eSIM and the eSIM plan. If not, you can scan the QR code with a device that is eSIM compatible by following these steps:

iOS

  1. Settings > Cellular or Mobile data > Add Cellular Plan > Scan the QR code
  2. Name the eSIM at your convenience from the "Cellular Plan Label."
  3. Do not turn on data roaming until you arrive at your destination

Android

Network & Internet > SIMs > Add Cellular Plan

The eSIM didn't get activated on my device. What should I do?

Check if your device is locked to a carrier, as eSIMs can't be activated on locked devices. Please contact your carrier for more information.

Can I scan one QR code with multiple devices?

No. You can use the eSIM only on one device. As such, one QR code can't be used multiple times or on multiple devices. Make sure to scan the QR code and activate the eSIM on the device you intend to use it on.

Should I turn on data roaming when I'm using the eSIM?

Yes. Make sure to turn on data roaming after you arrive at your destination. You can toggle it on from the eSIM settings.

An error occurred while I was installing the eSIM. What should I do?

The solutions depend on the error message you saw:

  • Cellular Plans from This Carrier Cannot Be Added:

Your device might be locked to a specific carrier. Please double-check from Settings > General > About > Carrier Lock. It should say "No SIM restrictions." If that's not the case, contact your original carrier to unlock the restrictions of your device.

  • Unable to Complete Cellular Plan Change:

It might be because too many eSIMs are installed on the device. Please double-check if your device has reached the maximum eSIM capacity, which eSIM service is on it, and try removing one of the unnecessary eSIMs.

Please make sure to turn on the mobile data on your device.

Please make sure that the eSIM plan hasn't been installed on another device.

Please make sure you have a stable connection while you're installing the eSIM.

  • This code is no longer valid:

Please make sure that the eSIM plan hasn't been activated on another device.

Please make sure you have a stable connection while you're installing the eSIM.

Try installing the eSIM through a different activation method. (There are two methods: In-app activation and QR code activation. You can try either on the same phone.)