10 Best Esim O2 in The UK

Last updated on 12/08/2025

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O2 Unlimited 5G Data SIM - Perfect for unlocked Phones, Routers, Tablets and Wifi Dongles - Activate anytime when you receive the SIM - Choose your Data Duration (12 Months)

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Why We Love It

Unlimited monthly data refreshes.
Easy QR code activation.
UK Data Sim, no roaming.

Main Highlights

ANYTIME ACTIVATION - Activate your Sim by scanning the supplied QR Code and enjoy 12 months of 4G & 5G data. We will activate your sim within 1 business day.
DATA RENEWAL OPTION - Extend your data usage beyond the initial term with the option to renew at the end, ensuring continuous connectivity without interruption.
UNIVERSAL DEVICE COMPATIBILITY - Optimised for Smartphones, Tablets, Laptops, Mobile Wi-Fi Dongles, Routers, IoT Devices, Smart Meters, Vehicles, Drones, GPS Trackers, Smart Home Devices & Security Cameras.
DEDICATED CUSTOMER SUPPORT - For any connection queries, our customer support team at Scancom is ready to assist you. Please contact support@scancom.co.uk
ZERO CONTRACTS - Benefit from our data services without the burden of contracts or recurring fees.
VERSATILE TRIPLE CUT SIM - Our all-in-one sim card fits any Standard, Micro, and Nano size device.
EXCLUSIVE UK DATA-ONLY - Tailored for data usage with a 600GB/month fair use UK-only data allowance. This Sim card does not support calls, texts, or roaming.
*Breach of fair usage policy: Data usage where users regularly tether to 12 or more devices or have used 600GB of data twice within a 6-month period. This includes fraudulent, abusive, illegal, nuisance, or outside normal commercial practice usage.

SimCorner Europe & UK Travel eSim Card - BIG 200GB Data. 30 Days. No Daily Limit. Use In 45 Countries. Data Only International Travel eSIM Card For eSim Compatible Mobile Phone, Ipads, Tablets

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Why We Love It

Stay connected across Europe.
Unlimited access to social media.
Simple and hassle-free activation.

Main Highlights

Stay Connected in Europe: Enjoy uninterrupted data access with our Europe & UK Data eSIM. Get a massive 200GB of fast data for your 30 day trip. Perfect for international travellers to over 45 European Countries. Note, this Sim does not work in Switzerland
No Online Restrictions: Access any website or social media app like Facebook, Whatsapp, Instagram, and more without limitations. No VPN needed. Use your mobile as a hotspot or tether to other devices, keeping everyone connected
Easy Activation: After you’ve ordered, you will receive simple step-by-step activation instructions. Our prepaid e-sim is hassle-free. This UK and Europe Travel eSIM card will automatically activate based on the Activation Date that you provide during the registration process.
More Data & Extended Time Available: If you need more data, buy multiple eSIMs to meet your specific data requirements. For longer trips, simply purchase additional eSIMs to stay connected beyond 30 days
Wide Device Compatibility: Our data-only eSIM works with mobile phones, Apple iPads, and tablets featuring eSIM support. While it doesn't include a phone number, you can make calls and send messages through popular apps

USA eSIM – 60GB 5G Data | Unlimited Local & International Calls/Text | Hotspot/Tethering allowed | 30-Day Prepaid Plan | Get eSIM Same Day!

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Why We Love It

High-speed data every month.
Prepaid eSIM for US travel.
24x6 multilingual support available.

Main Highlights

60GB of high-speed data allowance every month. Unlimited data at 3G speed after monthly allowance consumed. Hotspot/Tethering/Internet Sharing allowed
Prepaid USA eSIM card for travel to the US. Includes unlimited incoming and outgoing calls/SMS across all 49 states, including Hawaii and Puerto Rico, as well as to the UK and 100 other countries.
GET eSIM SAME DAY! A few hours after ordering, go to tsim.mobi/activate, enter your Amazon orderID and follow instructions to schedule immediate or later activation of eSIM. You will also receive an email with the URL and instructions if needed. The manual is also uploaded in the images.
Use a modern phone with eSIM capability to be able to utilise American networks. In general Chinese branded phones are NOT allowed on American networks. iPhones 12+ always work. Search for "t-mobile bring your own phone" or visit tsim.mobi/chat for free compatibility check.
24x6 (Monday-Saturday) multilingual support provided by phone, email and InstaChat. Use contact info printed on the SIM card packaging. No activation on Sundays

USA eSIM 21 Days | Call Home for Free | T-Mobile Network with Unlimited High Speed Data | Unlimited Local Calls and SMS to UK and USA (including Hawaii). Receive eSIM Same Day by Email and Start Using

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Why We Love It

Free calls to USA and UK.
Unlimited high-speed 5G data.
Easy eSIM activation process.

Main Highlights

CALL HOME FOR FREE : Unlimited calling and texting (SMS) to USA and UK phone numbers.
UNLIMITED HIGH SPEED DATA: Unlimited Super-Speed 5G/4G data in USA. Hotspot/Data Sharing Allowed. T-mobile Network has good reception in USA (Hawaii Included).
GET eSIM SAME DAY! A few hours after ordering, go to tsim.mobi/activate, enter your Amazon orderID and follow instructions to schedule immediate or later activation of eSIM. You will also receive an email with the URL and instructions if needed. The manual is also uploaded in the images.
COMPATIBILITY : Use a modern phone with eSIM capability to be able to utilise American networks. In general Chinese branded phones are NOT allowed on American networks. iPhones 12+ always work. Search for "t-mobile bring your own phone" or visit tsim.mobi/chat for free compatibility check.
SUPPORT: 24x6 (Monday-Saturday) multilingual support provided by phone, email and InstaChat. Use contact info printed on the SIM card packaging.

H2O Wireless 30-Day USA eSIM, Prepaid eSIM Card with 60GB High-Speed 4G LTE/5G Data & 5GB Mobile Hotspot, Unlimited Data, Talk & Text to 70+ Countries, US Mobile SIM Card for Cell Phones

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Why We Love It

High-speed 5G access available.
Unlimited talk and text freedom.
Flexible plans with no contracts.

Main Highlights

HIGH-SPEED DATA & HOTSPOT: With H2O Wireless eSIM, you can access 5G/4G LTE speeds for quick and effortless streaming, browsing, and video calls. Additionally, all of our plans include mobile hotspot capabilities to keep all your devices conveniently connected. After purchase, you will receive a postcard with instructions and a QR code linking you to our activation submission form.
UNLIMITED TALK & TEXT: With H2O Wireless eSIM, access an unlimited data with opportunities to renew every 30 days. Benefit from unlimited talk and text nationwide (and to 70+ countries internationally) without interruptions as long as your calls, text and data originate in the U.S.
FLEXIBLE PREPAID eSIM PLANS: With H2O Wireless, what you see is what you get. Enjoy a plan that suits your unique financial and coverage needs with no contracts and no hidden fees. As opposed to the tricky charges of traditional SIMs, we offer straightforward, cost-effective plans tailored to you!
GLOBAL CONNECTIVITY REIMAGINED: If you're residing or traveling in the US, experience easy international communication with unlimited calls and messages to over 70 countries. Our USA eSIM ensure you never skip beat even with those across the pond.
As a valued customer, you have the option to renew for 30, 60, or 90 days. Renewal is simple. Visit the JZN H2O Refill & Top-Up Page. Choose Your Plan. Enter your phone number. Apply the code: JZNAMAZON25. Complete your purchase and voila! Note: This is only for first time renewals and JZN activated numbers.

eSIM for Europe Travel 5G 4G LTE EU US Data Only Global Travel eSIM Card Apple e-Card International Travel Sim Card Daliy Package High Speed 2GB per day 20Day

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Why We Love It

Flexible eSIM for seamless connectivity.
Quick activation via unique QR code.
Affordable data plan, no roaming fees.

Main Highlights

【Flexible Usage】 Data-Only eSIM for Travel in Europe: Before purchasing, please confirm that your phone supports eSIM! Enjoy seamless 4G connectivity across European countries—data only, no phone number, calls, or texts. Perfect for staying connected on apps and the internet. Check your phone model with the list in the image provided
【Prompt Activation】 You will receive a unique eSIM QR code and an instruction manual by email within 14 hours after your payment is confirmed. No physical SIM is required—simply fill out the form to receive your SIM card number. FBA shipments will include printed instructions for your reference.
【Enough Activated Time】Credit valid for 60 days and pls check your eamil for the QR after Amazon validates payments.Please make sure that your device is eSIM compatible,500M per day high-speed data,then Switch to 384kbps once used up.The timer starts 1 days after activation.
【Stay Connected】Data-only plan without traditional calls or SMS. Use voice calling on apps like WhatsApp, Skype, Viber, Facebook Messenger, Hangouts, FaceTime, and access all your favorite apps anywhere: Signal, Meta, Instagram, X, TikTok, Google Maps, and more
【Save Money】Data-only plan with no extra roaming charges. With wiSIMLeap eSIM, get the most data for your money—no hidden fees or roaming costs. Data sharing is allowed. Enjoy enhanced 4G and 5G connectivity, improving everyday communication and enriching your travel experience.

H2O Wireless 120-Day USA eSIM, Prepaid eSIM Card with 3GB High-Speed 4G LTE/5G Data & 2GB Mobile Hotspot, Unlimited Data, Talk & Text to 70+ Countries, US Mobile SIM Card for Cell Phones

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Why We Love It

High-speed streaming and browsing.
Unlimited talk and text included.
Flexible, cost-effective prepaid plans.

Main Highlights

HIGH-SPEED DATA & HOTSPOT: With H2O Wireless eSIM, you can access 5G/4G LTE speeds for quick and effortless streaming, browsing, and video calls. Additionally, all of our plans include mobile hotspot capabilities to keep all your devices conveniently connected. After purchase, you will receive a postcard with instructions and a QR code linking you to our activation submission form.
UNLIMITED TALK & TEXT: With H2O Wireless eSIM, access an unlimited data with opportunities to renew every 30 days. Benefit from unlimited talk and text nationwide (and to 70+ countries internationally) without interruptions as long as your calls, text and data originate in the U.S.
FLEXIBLE PREPAID eSIM PLANS: With H2O Wireless, what you see is what you get. Enjoy a plan that suits your unique financial and coverage needs with no contracts and no hidden fees. As opposed to the tricky charges of traditional SIMs, we offer straightforward, cost-effective plans tailored to you!
GLOBAL CONNECTIVITY REIMAGINED: If you're residing or traveling in the US, experience easy international communication with unlimited calls and messages to over 70 countries. Our USA eSIM ensure you never skip beat even with those across the pond.
SEAMLESS eSIM TECHNOLOGY: Say goodbye to the hassle of dealing with physical SIM cards. eSIM technology offers enhanced protection against SIM card theft and allows you to switch providers with ease. Following purchase, a postcard will be sent to you. Simply scan the QR code that is on it, follow activation instructions, and endless connections await.

H2O Wireless 120-Day USA eSIM, Prepaid eSIM Card with 10GB High-Speed 4G LTE/5G Data & 5GB Mobile Hotspot, Unlimited Data, Talk & Text to 70+ Countries, US Mobile SIM Card for Cell Phones

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Why We Love It

Fast 5G/4G LTE speeds.
Unlimited talk and text.
Flexible prepaid eSIM plans.

Main Highlights

HIGH-SPEED DATA & HOTSPOT: With H2O Wireless eSIM, you can access 5G/4G LTE speeds for quick and effortless streaming, browsing, and video calls. Additionally, all of our plans include mobile hotspot capabilities to keep all your devices conveniently connected. After purchase, you will receive a postcard with instructions and a QR code linking you to our activation submission form.
UNLIMITED TALK & TEXT: With H2O Wireless eSIM, access an unlimited data with opportunities to renew every 30 days. Benefit from unlimited talk and text nationwide (and to 70+ countries internationally) without interruptions as long as your calls, text and data originate in the U.S.
FLEXIBLE PREPAID eSIM PLANS: With H2O Wireless, what you see is what you get. Enjoy a plan that suits your unique financial and coverage needs with no contracts and no hidden fees. As opposed to the tricky charges of traditional SIMs, we offer straightforward, cost-effective plans tailored to you!
GLOBAL CONNECTIVITY REIMAGINED: If you're residing or traveling in the US, experience easy international communication with unlimited calls and messages to over 70 countries. Our USA eSIM ensure you never skip beat even with those across the pond.
SEAMLESS eSIM TECHNOLOGY: Say goodbye to the hassle of dealing with physical SIM cards. eSIM technology offers enhanced protection against SIM card theft and allows you to switch providers with ease. Following purchase, a postcard will be sent to you. Simply scan the QR code that is on it, follow activation instructions, and endless connections await.

UK Multi-Network Data-Only eSIM | 12-Month Validity | Auto-Connects to Strongest Network: EE, Three, O2, or Vodafone | Compatible with eSIM Devices (10 GB - 12 Months)

Why We Love It

Effortless network switching keeps you connected.
Quick setup with simple QR scan.
Flexible data plans to fit needs.

Main Highlights

✅ DATA PLAN DETAILS: Enjoy your total data allowance over your plan duration, starting from the SIM’s first use. This is not a monthly allowance — it’s your full data package to use as needed! Need more? Top up in seconds via your MyGraspLet account.
✅ UNMATCHED NETWORK COVERAGE: Say goodbye to weak signals! Our SmartSIM automatically switches between EE, Vodafone, O2 and Three, ensuring you always have the strongest network signal anywhere in the UK. No more dead zones or dropped connections!
✅ WHAT’S INCLUDED: A physical eSIM QR code that can be scanned and installed in seconds on any eSIM-compatible device, giving you data access across all major UK networks — EE, Vodafone, O2, and Three. This is a data-only SIM, meaning no calls or texts — just pure, reliable internet!
✅ TRANSFERABLE eSIM: Install, remove, and reuse the eSIM across any of your supported devices — it’s that simple.
✅ WIDE DEVICE COMPATIBILITY: Works flawlessly with a wide range of eSIM-enabled devices — including smartphones, tablets, laptops, routers, and smart home systems.
✅ MYGRASPLET ACCOUNT: Sign up and manage your SIMs easily through the MyGraspLet online portal. Add multiple SIMs, track data usage, top up in seconds, and explore a variety of UK, EU, and USA data plans — all from one simple, user-friendly platform.
✅ HIGH-SPEED PERFORMANCE: Enjoy fast, dependable internet with support for 2G, 3G, 4G, and 5G networks. Stream, browse, and work online without interruptions.
✅ DEDICATED CUSTOMER SUPPORT: Our UK-based support team is available 24/7, all year round. Contact us anytime via support@grasplet.com or through your MyGraspLet account for fast, reliable assistance.

O2 SIM Card UK & EUROPE (ROAM FREE) PREPAID PAYG £20 Bundle -40GB + Unltd Texts & Mins - ROAMING ALLOWANCE 25GB + International Calling Option - (Love2surf RETAIL PACK)

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Why We Love It

Activates with a generous 40GB.
Compatible with multiple devices.
Includes affordable international calling.

Main Highlights

QUICK & EASY SIM ACTIVATION - 40GB
Bundle lasts 30 days from activation. NOTE: CREDIT WILL BE ZERO - allocated to bundle allowance (see description)
MUST USE SIM IN UK PRIOR TO USE IN EUROPE – data is limited to 25GB while roaming (calls & texts allowance is for UK numbers only)
Trio SIM fits any unlocked 2G and above phone or devices locked to O2 network. Personal hotspot/tethering allowed
INTERNATIONAL CALLING SERVICE TO USE WITH SIM - E.g. USA - 0.3p/min and EU - 0.3p/min (optional extra)

8.7

Excellent

We scanned 255 products

We reviewed these offers relevant to the Esim O2 within online retailers such as Amazon, eBay and other local retailers, ensuring we covered all major brands and models. The products we selected come from trusted brands like Scancom, SimCorner, TSIM, JZN Market, WISIMLEAP, GraspLet, love 2 surf, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Esim O2 in the market, we considered we took a deep dive into 1276 online reviews , focusing on elements like user satisfaction, performance in real-world conditions, and long-term reliability. Our ranking also evaluates each review’s relevancy, authenticity, up-to-dateness and depth so that the comparison is more sound.

We concluded that:

The clear winner of our analysis is O2 Unlimited 5G Data SIM - Perfect for unlocked Phones, Routers, Tablets and Wifi Dongles - Activate anytime when you receive the SIM - Choose your Data Duration (12 Months). We love many things about this product by Scancom. What sets it apart from the competition is Unlimited monthly data refreshes, Easy QR code activation, UK Data Sim, no roaming.
The best value product for most shoppers and where user satisfaction is continuously the highest is SimCorner Europe & UK Travel eSim Card - BIG 200GB Data. 30 Days. No Daily Limit. Use In 45 Countries. Data Only International Travel eSIM Card For eSim Compatible Mobile Phone, Ipads, Tablets by SimCorner based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Esim O2 and the best cost-to-value ratio is O2 SIM Card UK & EUROPE (ROAM FREE) PREPAID PAYG £20 Bundle -40GB + Unltd Texts & Mins - ROAMING ALLOWANCE 25GB + International Calling Option - (Love2surf RETAIL PACK)at love 2 surf with a % discount.
Our list of the best Esim O2 is updated regularly to reflect new releases and changes in product availability, so be sure to check back often for the latest rankings and discounts.

10 Best Esim O2 in The UK

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We scanned 255 products

We concluded that: