Best O2 Data Sim Only of 2026

Last updated on 03/04/2026

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O2 Unlimited Data SIM - Preloaded for 12 Months - No Contract - Quick Activation Within 1 Working Day - Mobile Broadband for Routers, Tablets & Phones

O2 Unlimited Data SIM - Preloaded for 12 Months - No Contract - Quick Activation Within 1 Working Day - Mobile Broadband for Routers, Tablets & Phones

Scancom

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.

9.9

Exceptional

9.9

Exceptional

Scancom

O2 Unlimited Data SIM - Preloaded for 12 Months - No Contract - Quick Activation Within 1 Working Day - Mobile Broadband for Routers, Tablets & Phones

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.

Value for Money

O2 Unlimited Data SIM - Preloaded for 6 Months - No Contract - Quick Activation Within 1 Working Day - Mobile Broadband for Routers, Tablets & Phones

O2 Unlimited Data SIM - Preloaded for 6 Months - No Contract - Quick Activation Within 1 Working Day - Mobile Broadband for Routers, Tablets & Phones

Scancom

Why we love it

Easy anytime activation process.
Renewable data for longer use.
Compatible with various devices.

Main Highlights

ANYTIME ACTIVATION - Activate your Sim by scanning the supplied QR Code and enjoy 6 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.

O2 Unlimited Data SIM - Preloaded for 6 Months - No Contract - Quick Activation Within 1 Working Day - Mobile Broadband for Routers, Tablets & Phones

Why we love it

Easy anytime activation process.
Renewable data for longer use.
Compatible with various devices.

Main Highlights

ANYTIME ACTIVATION - Activate your Sim by scanning the supplied QR Code and enjoy 6 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.

O2 Unlimited Data SIM - Preloaded for 2 Months - No Contract - Quick Activation Within 1 Working Day - Mobile Broadband for Routers, Tablets & Phones

O2 Unlimited Data SIM - Preloaded for 2 Months - No Contract - Quick Activation Within 1 Working Day - Mobile Broadband for Routers, Tablets & Phones

Scancom

Why we love it

Anytime activation within 1 day.
Zero contracts or recurring fees.
Universal device compatibility guaranteed.

Main Highlights

ANYTIME ACTIVATION - Activate your Sim by scanning the supplied QR Code and enjoy 2 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.

O2 Unlimited Data SIM - Preloaded for 2 Months - No Contract - Quick Activation Within 1 Working Day - Mobile Broadband for Routers, Tablets & Phones

Why we love it

Anytime activation within 1 day.
Zero contracts or recurring fees.
Universal device compatibility guaranteed.

Main Highlights

ANYTIME ACTIVATION - Activate your Sim by scanning the supplied QR Code and enjoy 2 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.

O2 Data Sim Card Preloaded with UNLIMITED 4G/5G Data. No Contracts, No Commitments, No Credit Checks, No Tie-ins, No Personal ID. (Valid for 1 Month)

O2 Data Sim Card Preloaded with UNLIMITED 4G/5G Data. No Contracts, No Commitments, No Credit Checks, No Tie-ins, No Personal ID. (Valid for 1 Month)

Sims4Travel

Why we love it

Unlimited high-speed data access.
No contracts or commitments.
Supports all devices seamlessly.

Main Highlights

O2 Data Sim Card Preloaded with UNLIMITED 4G/5G Data. No Contracts, No Commitments, No Credit Checks, No Tie-ins, No Personal ID. (Valid for 1 Month)
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.
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 and more. 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 Data SIM provides amazing performance without any speed restrictions.

O2 Data Sim Card Preloaded with UNLIMITED 4G/5G Data. No Contracts, No Commitments, No Credit Checks, No Tie-ins, No Personal ID. (Valid for 1 Month)

Why we love it

Unlimited high-speed data access.
No contracts or commitments.
Supports all devices seamlessly.

Main Highlights

O2 Data Sim Card Preloaded with UNLIMITED 4G/5G Data. No Contracts, No Commitments, No Credit Checks, No Tie-ins, No Personal ID. (Valid for 1 Month)
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.
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 and more. 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 Data SIM provides amazing performance without any speed restrictions.

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).

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).

Sims4Travel

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 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).

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 Unlimited 5G Data SIM - Mobile Broadband for Phones & Routers - No Contract - £25/Month Rolling Subscription

O2 Unlimited 5G Data SIM - Mobile Broadband for Phones & Routers - No Contract - £25/Month Rolling Subscription

Scancom

70% Off

Why we love it

Anytime activation with QR code.
Easy monthly automatic payments.
No contracts for peace of mind.

Main Highlights

FAST QR ACTIVATION – Scan the QR code, complete payment online and activate within 1 business day.
FLEXIBLE 30-DAY ROLLING PLAN – No long-term commitment. Renews every 30 days and can be cancelled anytime.
SUBSCRIPTION MANAGEMENT – Done securely via customer portal provided by our support team
EASY MONTHLY BILLING – Automatic payments taken on the same date each month
NO CONTRACTS OR CREDIT CHECKS – Enjoy unlimited UK data with no binding agreements or hidden charges.
TERMINATION POLICY – If a payment fails, the SIM is deactivated immediately and cannot be reinstated once cancelled.
UNIVERSAL DEVICE COMPATIBILITY – Designed to work with all SIM-enabled devices, including mobile routers, home broadband hubs, smartphones, and tablets.
UK-ONLY UNLIMITED DATA – Optimised for UK 4G/5G data use. Calls, texts, and roaming are not included.
FAIR USAGE POLICY – 600GB monthly data allowance.

O2 Unlimited 5G Data SIM - Mobile Broadband for Phones & Routers - No Contract - £25/Month Rolling Subscription

70% Off

Why we love it

Anytime activation with QR code.
Easy monthly automatic payments.
No contracts for peace of mind.

Main Highlights

FAST QR ACTIVATION – Scan the QR code, complete payment online and activate within 1 business day.
FLEXIBLE 30-DAY ROLLING PLAN – No long-term commitment. Renews every 30 days and can be cancelled anytime.
SUBSCRIPTION MANAGEMENT – Done securely via customer portal provided by our support team
EASY MONTHLY BILLING – Automatic payments taken on the same date each month
NO CONTRACTS OR CREDIT CHECKS – Enjoy unlimited UK data with no binding agreements or hidden charges.
TERMINATION POLICY – If a payment fails, the SIM is deactivated immediately and cannot be reinstated once cancelled.
UNIVERSAL DEVICE COMPATIBILITY – Designed to work with all SIM-enabled devices, including mobile routers, home broadband hubs, smartphones, and tablets.
UK-ONLY UNLIMITED DATA – Optimised for UK 4G/5G data use. Calls, texts, and roaming are not included.
FAIR USAGE POLICY – 600GB monthly data allowance.

OneCall O2 Prepaid 30 Day Unlimited Data SIM - 4G/5G, 25GB EU Roaming

OneCall O2 Prepaid 30 Day Unlimited Data SIM - 4G/5G, 25GB EU Roaming

OneCall

Why we love it

Unlimited calls, texts, data.
Hassle-free prepaid option.
No commitments or contracts.

Main Highlights

Pre-loaded O2 SIM card with UNLIMITED calls, texts & 4G/5G Data for use in the UK. Fast 4G/5G Speeds with No Restrictions.
Includes 25GB of Data which can be used to Roam Free at no extra cost in the EU
Eliminate the Hassle of a PAYG SIM card with this Prepaid 30 Day SIM - No top ups required
SIM card is packaged for all sizes for free: Nano, Micro and standard SIM card size
No Contracts, No Commitments, No Credit Checks

OneCall O2 Prepaid 30 Day Unlimited Data SIM - 4G/5G, 25GB EU Roaming

Why we love it

Unlimited calls, texts, data.
Hassle-free prepaid option.
No commitments or contracts.

Main Highlights

Pre-loaded O2 SIM card with UNLIMITED calls, texts & 4G/5G Data for use in the UK. Fast 4G/5G Speeds with No Restrictions.
Includes 25GB of Data which can be used to Roam Free at no extra cost in the EU
Eliminate the Hassle of a PAYG SIM card with this Prepaid 30 Day SIM - No top ups required
SIM card is packaged for all sizes for free: Nano, Micro and standard SIM card size
No Contracts, No Commitments, No Credit Checks

Wave Connect Quad Network Data Only SIM Card, Three, EE, O2, Vodafone, 4G LTE + 5G Prepaid, Activates On First Use, Includes UK, Ireland, EU, For Unlocked IoT Devices, Cameras (12GB | 12 Months)

Wave Connect Quad Network Data Only SIM Card, Three, EE, O2, Vodafone, 4G LTE + 5G Prepaid, Activates On First Use, Includes UK, Ireland, EU, For Unlocked IoT Devices, Cameras (12GB | 12 Months)

Wave Connect

Why we love it

Versatile 3-in-1 SIM card.
Easy online data management.
Works with various devices.

Main Highlights

THE PLAN: Data only SIM card with 12GB valid for 12 months (not 12GB per month). Refill any time to reset the duration.
WHAT’S INCLUDED: A 3-in-1 SIM card with data to use across all major UK networks. The card includes standard/micro/nano sizes. This is data-only, no voice or text.
HOW IT WORKS: Insert to use straight away, register online to view data use and top-up.
WHY THIS SIM? Enjoy online access to view data consumption, add alerts and notifications when nearing your data allowance, and top-up manually or choose automatic top-ups with different data allowances available.
WHO’S THIS FOR? This non-steered SIM card connects to all networks so is great for trail cameras, CCTV, surveillance, security, movement cameras, solar energy monitoring systems and wind turbines - although it will work with most devices.
TOP-UP ANYTIME: A choice of options to add more data based on your use. Downgrade or upgrade at any time. Select automatic refill to ensure you’re always connected.

Wave Connect Quad Network Data Only SIM Card, Three, EE, O2, Vodafone, 4G LTE + 5G Prepaid, Activates On First Use, Includes UK, Ireland, EU, For Unlocked IoT Devices, Cameras (12GB | 12 Months)

Why we love it

Versatile 3-in-1 SIM card.
Easy online data management.
Works with various devices.

Main Highlights

THE PLAN: Data only SIM card with 12GB valid for 12 months (not 12GB per month). Refill any time to reset the duration.
WHAT’S INCLUDED: A 3-in-1 SIM card with data to use across all major UK networks. The card includes standard/micro/nano sizes. This is data-only, no voice or text.
HOW IT WORKS: Insert to use straight away, register online to view data use and top-up.
WHY THIS SIM? Enjoy online access to view data consumption, add alerts and notifications when nearing your data allowance, and top-up manually or choose automatic top-ups with different data allowances available.
WHO’S THIS FOR? This non-steered SIM card connects to all networks so is great for trail cameras, CCTV, surveillance, security, movement cameras, solar energy monitoring systems and wind turbines - although it will work with most devices.
TOP-UP ANYTIME: A choice of options to add more data based on your use. Downgrade or upgrade at any time. Select automatic refill to ensure you’re always connected.

Zappyfi Data-Only Multi-Network SIM Card, 4G/5G, Auto-Switch EE, Vodafone, O2 & Three, Prepaid PAYG, UK & EU Roaming Travel SIM, for Phones, Routers & IoT Devices (12GB | 12 Months)

Zappyfi Data-Only Multi-Network SIM Card, 4G/5G, Auto-Switch EE, Vodafone, O2 & Three, Prepaid PAYG, UK & EU Roaming Travel SIM, for Phones, Routers & IoT Devices (12GB | 12 Months)

Zappyfi

Why we love it

Flexible data, no monthly limits.
Multi-network connectivity for strongest signal.
UK-based 24/7 support.

Main Highlights

Flexible data plan – use it your way: Your total data allowance is valid for the full plan duration from first use, not monthly. Use it as you need and top up anytime via your MyZappyfi account.
Multi-network / quad-network connectivity: Automatically switches between EE, Vodafone, O2 and Three to connect to the strongest available signal across the UK.
UK & 25+ Countries Roaming Coverage: Use your Zappyfi data SIM across the UK and over 25 countries, including Belgium, France, Germany, Greece, Italy, Netherlands, Spain, Sweden, Switzerland and more (see product images for the full list). Coverage depends on destination and plan.
MyZappyfi online account control: Track real-time data usage, receive notifications, manage SIMs and top up with a variety of data plans based on your travel and data needs.
Fast 4G & 5G data speeds: Supports high-speed mobile data on compatible devices for browsing, streaming, navigation and remote access.
Prepaid PAYG data-only SIM: No contracts, no credit checks and no calls or texts. Use your data when you need it and stay in control.
Works in phones, routers and smart devices: Compatible with unlocked smartphones, 4G/5G WiFi routers and hotspots, tablets, CCTV and security cameras, GPS trackers and IoT devices.
24/7 UK-based customer support: Get help anytime with access to reliable UK-based support for activation, usage, top-ups and technical assistance.

Zappyfi Data-Only Multi-Network SIM Card, 4G/5G, Auto-Switch EE, Vodafone, O2 & Three, Prepaid PAYG, UK & EU Roaming Travel SIM, for Phones, Routers & IoT Devices (12GB | 12 Months)

Why we love it

Flexible data, no monthly limits.
Multi-network connectivity for strongest signal.
UK-based 24/7 support.

Main Highlights

Flexible data plan – use it your way: Your total data allowance is valid for the full plan duration from first use, not monthly. Use it as you need and top up anytime via your MyZappyfi account.
Multi-network / quad-network connectivity: Automatically switches between EE, Vodafone, O2 and Three to connect to the strongest available signal across the UK.
UK & 25+ Countries Roaming Coverage: Use your Zappyfi data SIM across the UK and over 25 countries, including Belgium, France, Germany, Greece, Italy, Netherlands, Spain, Sweden, Switzerland and more (see product images for the full list). Coverage depends on destination and plan.
MyZappyfi online account control: Track real-time data usage, receive notifications, manage SIMs and top up with a variety of data plans based on your travel and data needs.
Fast 4G & 5G data speeds: Supports high-speed mobile data on compatible devices for browsing, streaming, navigation and remote access.
Prepaid PAYG data-only SIM: No contracts, no credit checks and no calls or texts. Use your data when you need it and stay in control.
Works in phones, routers and smart devices: Compatible with unlocked smartphones, 4G/5G WiFi routers and hotspots, tablets, CCTV and security cameras, GPS trackers and IoT devices.
24/7 UK-based customer support: Get help anytime with access to reliable UK-based support for activation, usage, top-ups and technical assistance.

O2 Sim Card preloaded with UNLIMITED Data, Calls and Texts for 1 month

Generic

Why we love it

Unlimited 4G/5G data.
Unlimited calls and texts.
No contracts or credit checks.

Main Highlights

Unlimited 4G/5G Data: Enjoy unlimited high-speed 4G/5G data usage on the O2 network without any data caps or restrictions
Unlimited Calls and Texts: Make unlimited voice calls and send unlimited text messages to any UK number throughout your plan period
30-Day Rolling Plan: Flexible monthly plan that automatically renews every 30 days from activation with no long-term commitment required
Easy Activation Process: Simple setup by scanning the QR code to register and activate your SIM card with secure Direct Debit payment
No Credit Checks or Contracts: Get started immediately without credit checks or binding contracts, offering complete flexibility and convenience

O2 Sim Card preloaded with UNLIMITED Data, Calls and Texts for 1 month

Why we love it

Unlimited 4G/5G data.
Unlimited calls and texts.
No contracts or credit checks.

Main Highlights

Unlimited 4G/5G Data: Enjoy unlimited high-speed 4G/5G data usage on the O2 network without any data caps or restrictions
Unlimited Calls and Texts: Make unlimited voice calls and send unlimited text messages to any UK number throughout your plan period
30-Day Rolling Plan: Flexible monthly plan that automatically renews every 30 days from activation with no long-term commitment required
Easy Activation Process: Simple setup by scanning the QR code to register and activate your SIM card with secure Direct Debit payment
No Credit Checks or Contracts: Get started immediately without credit checks or binding contracts, offering complete flexibility and convenience

We scanned 1317 products

We reviewed these offers relevant to the O2 Data Sim Only 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, Sims4Travel, OneCall, Wave Connect, Zappyfi, Generic, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best O2 Data Sim Only in the market, we considered we took a deep dive into 6586 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 Data SIM - Preloaded for 12 Months - No Contract - Quick Activation Within 1 Working Day - Mobile Broadband for Routers, Tablets & Phones. 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 O2 Unlimited Data SIM - Preloaded for 6 Months - No Contract - Quick Activation Within 1 Working Day - Mobile Broadband for Routers, Tablets & Phones by Scancom based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for O2 Data Sim Only and the best cost-to-value ratio is O2 Unlimited 5G Data SIM - Mobile Broadband for Phones & Routers - No Contract - £25/Month Rolling Subscriptionat Scancom with a 70% discount.
Our list of the best O2 Data Sim Only 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.