10 Best Esim O2 in The UK

Last updated on 27/05/2025

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Best Choice

9.8

Exceptional

SimOnly Club

Instant UK, EUROPE, and USA eSIM Connectivity Anywhere you go | 12 Month Validy, No-Contract, O2 Network Coverage

Why We Love It

Unlimited 5G data access.
No contracts or hidden fees.
Immediate connectivity upon activation.

Main Highlights

UNLIMITED DATA: Enjoy unrestricted 5G data access across the UK with comprehensive O2 network coverage reaching 99% of the population
NO CONTRACT REQUIRED: £20 pay-as-you-go SIM with no lengthy commitments or hidden charges - perfect for flexible mobile connectivity
NETWORK FLEXIBILITY: Easy network switching capability ensures you stay connected wherever you travel within the coverage area
INSTANT ACTIVATION: Quick and simple setup process gets you connected immediately upon receiving your SIM card
EXTENDED VALIDITY: 12-month validity period provides long-term reliable service without the need for frequent renewals

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)

5% OffFree Shipping

Why We Love It

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

Main Highlights

「4G Cheap SIM Free Unlocked Mobile Phones Not 5G phones Dual SIM」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
「Who Is It Suitable For」Cheap and Enough but not excellent. Not for downloading many apps or not for a gamer. Don’t have strong performance. Only for daily communication, browsing the internet, watching videos, and will spend less time on mobile phones. This will be a good choice, you will get what you pay for
「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
「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
「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
「Warning」Keep mobile phones away from the high temperature. Don't use it while it's charging. The phone and battery are separate when you get it. Please open the phone cover and put battery in first before power on. Please charge it for more than 30 minutes without any actions before use. If you have any problems, like can't power on, cracked screen so on, please let us which named "HeyxFome store" know first and we will give you a satisfactory respond within 12 hours

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

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

Effortless Multi-Network Coverage: Enjoy uninterrupted service with automatic switching between O2, Vodafone, EE, and Three. Always stay connected with the strongest network signal across the UK.
Dual SIM Functionality: Ideal as a secondary data SIM for iPhone or Android smartphones. Ensure your device supports eSIM technology before purchase.
Single Use: This eSIM is non-transferable between devices once downloaded.
Plug & Play Simplicity: Easy setup with a quick scan of the physical QR code. Activate your eSIM and start using it immediately—no complex procedures required.
Flexible Data Plans: Select from a variety of UK, EU, and USA data plans tailored to your needs. Whether you're a casual user or a heavy streamer, easily top up online whenever more data is needed.
MyGraspLet Account: Manage your eSIM effortlessly through the MyGraspLet portal. Monitor data usage, top up, and explore additional plans from one convenient location.
Wide Device Compatibility: Compatible with a broad range of eSIM-enabled devices, including smartphones, tablets, laptops, routers, and smart home devices.
High-Speed Performance: Experience fast internet with support for 2G, 3G, 4G, and 5G networks. Stream, browse, and work online seamlessly.
Dedicated Customer Support: Our responsive support team is available via email or through your MyGraspLet account at support@grasplet.com, ready to assist you with any inquiries.
UK Data Only: This eSIM is preloaded with data for use within the UK, excluding roaming, calls, and texts—ideal for those needing reliable data without additional features.

O2 PAYG SIM | WITH 25GB DATA + UNLIMITED CALLS & TEXTS PLUS FREE EU ROAMING

Free Shipping

Why We Love It

Massive data for all needs.
Unlimited calls and texts included.
Travel freely across Europe.

Main Highlights

Massive Data Allowance: Enjoy 60GB of high-speed data for browsing, streaming, and more.
Unlimited Calls and Texts: Make unlimited calls and send unlimited texts within the UK.
Free European Roaming: Travel worry-free with free roaming in Europe.
Prepaid Convenience: No contracts or credit checks required for this prepaid SIM card.
Data Rollover: Carry over what you don't use
Flexible Top-Up Options: Easily top up your account online or at various retail locations.

O2 SIM Card UK & EUROPE (ROAM FREE) PREPAID PAYG £30 Bundle -125GB + Unltd Texts & Mins - ROAMING ALLOWANCE 25GB + International Calling Option - (Love2surf RETAIL PACK)

Free Shipping

Why We Love It

Large data allowance.
International calling rates affordable.
Flexible Trio SIM card.

Main Highlights

QUICK & EASY SIM ACTIVATION - 125GB
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)

United Kingdom eSIM 20GB 30 Days 5G | Instant QR Email | No Roaming Fees | iPhone Samsung Pixel

Why We Love It

Fast 4G and 5G connectivity.
Convenient QR code delivery.
No extra cost for sharing.

Main Highlights

20GB 4G and 5G data for the United Kingdom
30-day countdown starts on first network connection
QR sent via Amazon message within 10 minutes, get online fast
Works on unlocked eSIM phones: iPhone XS+, Galaxy S20+, Pixel 4+
No roaming shocks, hotspot sharing allowed at no extra cost

07 * 23 646 838 - Gold VIP Business Easy Mobile Phone Number Diamond Platinum UK Sim Card

Why We Love It

Fits any mobile device.
Quick network transfer option.
Privacy-protecting numbered card.

Main Highlights

A Triple Cut (Standard/Micro/Nano) UK Pay As You Go sim card. Fits all Mobile Phone devices.
Use on the network supplied, or transfer it to any other UK network - within 2 working days.
You MUST topup OR transfer the number to another network, to prevent it expiring.
To protect privacy, the missing number (*) is revealed only to the buyer, and can not be chosen.
A physical simcard with the number shown is posted out to you. (No E-Sims & No PAC supplied)
Choose carefully. After purchase, numbers cannot be exchanged or returned.
Message us before purchase if you wish to know the network.

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

Free Shipping

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

07999 8 * 30 20 - Gold VIP Business Easy Mobile Phone Number Diamond Platinum UK Sim Card

Main Highlights

A Triple Cut (Standard/Micro/Nano) UK Pay As You Go sim card. Fits all Mobile Phone devices.
Use on the network supplied, or transfer it to any other UK network - within 2 working days.
You MUST topup OR transfer the number to another network, to prevent it expiring.
To protect privacy, the missing number (*) is revealed only to the buyer, and can not be chosen.
A physical simcard with the number shown is posted out to you. (No E-Sims & No PAC supplied)
Choose carefully. After purchase, numbers cannot be exchanged or returned.
Message us before purchase if you wish to know the network.

8.7

Excellent

We scanned 1881 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 SimOnly Club, HeyxFome, O2, GraspLet, GlobalSIMs, love 2 surf, Graba SIM, Generic, TOPDON, 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 9406 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 Instant UK, EUROPE, and USA eSIM Connectivity Anywhere you go | 12 Month Validy, No-Contract, O2 Network Coverage. We love many things about this product by SimOnly Club. What sets it apart from the competition is Unlimited 5G data access. , No contracts or hidden fees. , Immediate connectivity upon activation. .
The best value product for most shoppers and where user satisfaction is continuously the highest is 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) by HeyxFome 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 1881 products

We concluded that: