10 Best Esim O2 in The UK

Last updated on 17/06/2025

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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.

Three 50GB Data SIM – Uncapped 5G Speeds – Preloaded EVERY MONTH Until 8th JUNE 2027 – No Contract – Plug & Play for Business Broadband, Routers & Phones

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Why We Love It

50GB data monthly preloaded.
Effortless plug and play.
Zero contracts or fees.

Main Highlights

PRELOADED DATA - 50GB Data renewed monthly until 8th June 2027 for a one-off payment.
EFFORTLESS PLUG & PLAY – Enjoy seamless 4G and 5G connectivity with no initial setup required.
THE UK’S FASTEST 5G NETWORK – Stream, play, watch, work & explore with the power of 5G.
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 SUPPORT - Gain peace of mind with our dedicated business customer support, ready to assist you whenever needed. Please reach us at support@scancom.co.uk with the sim number and order reference.
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 - This Sim card does not support calls, texts, or roaming.
Sims cannot be ported/transferred, promotions are non-renewable, and support for pre-registered sims is available exclusively via email.
This item is tailored for business customers. If your order is not in the name of company / non profit registered at companies house or an Amazon business customer, by purchasing, you affirm your status as a self-employed individual.

Three 500GB Data SIM – Uncapped 5G Speeds – Preloaded EVERY MONTH Until 8th NOVEMBER 2026 – No Contract – Plug & Play for Business Broadband, Routers & Phones

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Why We Love It

500GB data monthly renewed.
Universal device compatibility assured.
UK’s fastest 5G connectivity.

Main Highlights

PRELOADED DATA - 500GB Data renewed monthly until 8th November 2026 for a one-off payment.
EFFORTLESS PLUG & PLAY – Enjoy seamless 4G and 5G connectivity with no initial setup required.
THE UK’S FASTEST 5G NETWORK – Stream, play, watch, work & explore with the power of 5G.
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 SUPPORT - Gain peace of mind with our dedicated business customer support, ready to assist you whenever needed. Please reach us at support@scancom.co.uk with the sim number and order reference.
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 - This Sim card does not support calls, texts, or roaming.
Sims cannot be ported/transferred, promotions are non-renewable, and support for pre-registered sims is available exclusively via email.
This item is tailored for business customers. If your order is not in the name of company / non profit registered at companies house or an Amazon business customer, by purchasing, you affirm your status as a self-employed individual.

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

TOPDON AL400-A OBD2 Code Reader, 10 OBD2 Functions, Check Engine Light/Smog Emission Test / O2 Sensor Test/EVAP, Free Lifetime Update

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Why We Love It

Advanced OBD2 functionality.
Effortless smog checks.
Free software updates.

Main Highlights

10+ OBD2 FUNCTIONS: this scanner provides all OBD2 functions for vehicles compatible with OBD/EOBD/CAN (Controller Area Network) protocol. The most commonly used OBD features include reading and erasing DTCs, I/M readiness, graphic data stream, freeze frame, O2 sensor test, on-board monitor test, EVAP test, and vehicle information
ONE-CLICK SMOG CHECKER: I/M readiness button checks the exhaust fumes to help automobiles pass emissions tests with one click
FREE SOFTWARE UPDATE: this code reader can be upgraded for free, simply connect the device to a computer and install the updates through TOPDON's website. Scanners with similar features usually require yearly subscriptions
EASY TO USE: plug the connector into the 16-pin DLC, turn on the ignition, and the scanner will automatically connect to the vehicle, displaying the main menu for easy navigation
MULTI-LANGUAGE: both the menu and DTC definitions are available in 7 languages English, French, German, Italian, Spanish, Portuguese, Japanese.
WIDE COMPATIBILITY: this OBD2 code reader works on most US-based cars since 1996, EU-based cars after 2000, and Asian-based cars after 2008. Our hotline provides 24-hour technical support for prompt problem resolution at support@topdon.com

HeyxFome H3 Cheap 2025 New 4G LTE SIM Free Unlocked Mobile Phones 6.0” Unlocked Android Phones 2GB+16GB Quad Core 3000mAh Android 10 Mobile phone 8MP Smartphone Dual SIM Face Unlock UK (Black)

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Why We Love It

Compatible with most UK carriers.
Expandable storage up to 256GB.
Good grip.

Main Highlights

「Notes before purchasing」It may be a little slow which is just a basic phone. Cheap and enough use but not excellent. No for downloading many apps or no for a gamer. It doesn’t have strong performance. Only for daily calling, texting, browsing the internet and watching videos. It may be a good choice
「6.0” 18:9 Screen Cheap Android Phone Weight Only 193g」The aspect ratio of the cheap android phone is 18:9. The cheap smartphone unlocked is about 0.35 inch thick and weighs only 193g, providing you with a good grip feel
「RAM 2GB + ROM 16GB / 256GB TF Card Expansion」RAM 2GB of running memory helps you switch between daily apps. With 16GB of built-in storage, it is enough to store daily photos. Note; the system will occupy some storage space, so your unlocked mobile phone will be less than 16GB. According to personal needs, you can add an external TF card up to 256GB for expansion. Not including TF cards
「4G Dual SIM Not 5G phones」Cheap 4G unlocked mobile phones are compatible with most UK carriers like EE, O2, Vodafone and Three. Please confirm your carrier before purchasing to prevent you from being unable to use your network. No SIM card in package. Not support e-SIM
「8MP Main Mobile Phone Camera」This cheap unlocked mobile phone is equipped with a rear 8MP main camera and a 5MP front camera, making it a great assistant at recording beautiful moments in life. But it is not an excellent photo recorder. Professional camera enthusiasts should buy another professional photography mobile phone
「3000mAh Battery Without Fast Charging」The cheap smartphone is equipped with a 3000mAh battery that is enough to support your normal use. This cheap mobile phone doesn’t support fast charging. Please arrange a charging time before going out
「Notes after purchase」The battery is at the bottom of the box when you open the package. Before turning on the phone, you need to open the back cover as the picture in the description. After successfully turning on the phone, please let it sit for 30 minutes to charge. Then connect to WiFi and try it out. If you are still satisfied so far, open the back cover again and insert your SIM cards to use as picture ②. If you have any problems, the seller will respond faster than Amazon and will solve it better for you

HeyxFome H3 Cheap 2025 New 4G LTE SIM Free Unlocked Mobile Phones 6.0” Unlocked Android Phones 2GB+16GB Quad Core 3000mAh Android 10 Mobile phone 8MP Smartphone Dual SIM Face Unlock UK (Gold)

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Why We Love It

Dual SIM compatibility included.
Expandable storage up to 256GB.
Lightweight and easy grip.

Main Highlights

「Notes before purchasing」It may be a little slow which is just a basic phone. Cheap and enough use but not excellent. No for downloading many apps or no for a gamer. It doesn’t have strong performance. Only for daily calling, texting, browsing the internet and watching videos. It may be a good choice
「6.0” 18:9 Screen Cheap Android Phone Weight Only 193g」The aspect ratio of the cheap android phone is 18:9. The cheap smartphone unlocked is about 0.35 inch thick and weighs only 193g, providing you with a good grip feel
「RAM 2GB + ROM 16GB / 256GB TF Card Expansion」RAM 2GB of running memory helps you switch between daily apps. With 16GB of built-in storage, it is enough to store daily photos. Note; the system will occupy some storage space, so your unlocked mobile phone will be less than 16GB. According to personal needs, you can add an external TF card up to 256GB for expansion. Not including TF cards
「4G Dual SIM Not 5G phones」Cheap 4G unlocked mobile phones are compatible with most UK carriers like EE, O2, Vodafone and Three. Please confirm your carrier before purchasing to prevent you from being unable to use your network. No SIM card in package. Not support e-SIM
「8MP Main Mobile Phone Camera」This cheap unlocked mobile phone is equipped with a rear 8MP main camera and a 5MP front camera, making it a daily assistant at recording beautiful moments in life. But it is not an excellent photo recorder. Professional camera enthusiasts should buy another professional photography mobile phone
「3000mAh Battery Without Fast Charging」The cheap smartphone is equipped with a 3000mAh battery that is enough to support your normal use. This cheap mobile phone doesn’t support fast charging. Please arrange a charging time before going out
「Notes after purchase」The battery is at the bottom of the box when you open the package. Before turning on the phone, you need to open the back cover as the picture in the description. After successfully turning on the phone, please let it sit for 30 minutes to charge. Then connect to WiFi and try it out. If you are still satisfied so far, open the back cover again and insert your SIM cards to use as picture ②. If you have any problems, the seller will respond faster than Amazon and will solve it better for you

Ulefone Note 19 Smartphone Android 14 6GB+64GB/512GB SD 5000mAh, Octa Core Mobile Phones Unlocked 6.65” HD+ 8MP+5MP Panorama Camera,4G Dual SIM Fingerprint Face ID OTG,UK Version 2 year warranty-Green

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Why We Love It

Long-lasting 5000mAh battery.
Latest Android 14 experience.
Sleek design, lightweight build.

Main Highlights

【5000mAh Battery + Power Bank Function】: The Ulefone Note 19 comes with a 5000mAh battery, capable of 330 hours of standby time, 15 hours of talk time, 12 hours of music time, and 7 hours of video time, offering a full day of use with just one charge. OTG function supports reverse charging, makes Note 19 as a power bank!
【Latest Android 14 & Google Play】: Running on the latest Android 14, the Ulefone Note 19 delivers an enhanced, secure, and user-friendly experience.The Ulefone Note 19 has full access to Google Play, allowing you to safely download all apps.
【6.56" Large Display】: The Ulefone Note 19 4G unlocked phone features a 6.56-inch HD+ display with a 20:9 aspect ratio, 720 x 1612resolution, and a 89% screen-to-body ratio, offering fast, lifelike clarity and vibrant colors, providing an impressive cinematic experience. Splash Proof, With a piece of mind when the Note 19 is exposed to unexpected splashes, light rain, or sweat.
【Lightweight Body, Elegant Design】: The Ulefone Note 19 smartphone comes with a slim body at 8.75mm and weighs only 192g, super lightweight and thin. Gracefully rounded corners and flat frame design create a tactile delight to hold and a feast to the eye. The Ulefone Note 19 smartphone is definitely the best value for money!
【Octa Core Processor, Up to 6GB + 64GB/512GB SD】: The Ulefone Note 19 is powered by a powerful Unisoc T603 Octa Core processor, offering faster processing and reduced lag. It features up to 6GB RAM (3GB RAM + 3GB virtual RAM) + 64GB of internal storage + 512GB SD card expansion, making downloading and sharing a breeze.
【8MP+ 5MP Camera 】: The unlocked Ulefone Note 19 smartphone is equipped with a 8MP rear camera, supporting panorama, portrait, night mode, rendering with fine details and colors in complex lighting environments. The 8MP front camera makes your selfie photos stand out.
【4G LTE Dual SIM 】: The Ulefone Note 19 4G dual sim phone supports global frequency bands, compatible with EE, O2, Vodafone, Three (TRE), Virgin, Giff Gaff, Orange, T-mobile, Sky Mobile, iD Mobile and more compatible networks. 3 Card slot, supports 2 Nano SIM cards + 1 TF card.
【Fingerprint/Face ID & 24-Month Warranty】: Integrated with multiple features, ✔️side fingerprint, ✔️Face ID, ✔️GPS + Glonass+ Galileo, ✔️FM radio, ✔️3.5mm headphone jack, and ✔️Exclusive Service Center App. Ulefone promises 2 years for warranty. if you have any questions, please feel free to contact us.

O2 Data Sim Card Preloaded with UNLIMITED 4G/5G Data. Includes 25GB to Roam for Free in 47 Countries. No Contracts, No Commitments, No Credit Checks, No Tie-ins, No Personal ID. (Valid for 1 Month).

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Why We Love It

Unlimited 4G/5G data preloaded.
No contracts or commitments.
Supports free international roaming.

Main Highlights

PRELOADED DATA: O2 SIM Card Preloaded with UNLIMITED 4G/5G Data. Enjoy Super-Fast 4G/5G Data Speeds with the UK’s most reliable network. The Data Sim Bundle lasts for 1 month from first use. Easy to renew your bundle for longer
NO CONTRACTS: The Preloaded O2 Data SIM Card is simple to activate. There are No Contracts, No Commitments, No Credit Checks, No Tie-ins & No Personal ID required
FREE ROAMING: Includes 25GB of Data which can be used to Roam for Free in any of the 47 countries listed in the description below. So whether you are on Holiday, a Business Trip or Working from Home, you can count on the Preloaded O2 4G/5G Data SIM for reliable & super-fast internet
MULTIPLE USES: The Sim comes in a Triple-Sized format, meaning it is suitable for use with all O2 or Unlocked Mobile Wi-Fi devices, Routers, Tablets, iPads, Dongles, Laptops, Mobile Phones, CCTV & Alarm systems. Tethering & Mobile Hotspots are also supported
SPEED YOU WILL LOVE: Working from Home, Streaming Online, Gaming, Scrolling through Social Media - The O2 4G/5G Preloaded SIM card provides amazing performance without any speed restrictions

O2 Big Bundle 10 tariff SIM Card, BB10 Model, LTE Technology

62% Off

Why We Love It

Flexible pay-as-you-go option.
Enjoy O2 Wifi hotspot access.
No long-lasting contract obligation.

Main Highlights

O2 Bundles Pay As You Go SIM card
Exchange your £10 monthly top up for the bundle of data, minutes and texts
O2 Wifi hotspot Access
O2 Priority Access after Topup
No Contract only top-up when required to activate the bundle for 30 days or use standard rates

8.7

Excellent

Save 62%

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, TOPDON, HeyxFome, Ulefone, Sims4Travel, O2, 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 Three 50GB Data SIM – Uncapped 5G Speeds – Preloaded EVERY MONTH Until 8th JUNE 2027 – No Contract – Plug & Play for Business Broadband, Routers & Phones by Scancom 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 Big Bundle 10 tariff SIM Card, BB10 Model, LTE Technologyat O2 with a 62% 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: