10 Best Unlimited Data Only Sim Card in The UK

Last updated on 20/07/2025

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Best Choice

9.8

Exceptional

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EE PAYG SIM card preloaded with 120GB of Data

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Why We Love It

Generous 120GB data included.
Valid for a year from activation.
No contracts, no commitments.

Main Highlights

120GB of Data Included
Lasts up to 12 months from activation
No contract, no commitment. You can top-up to buy more data
The EE PAYG 120GB data SIM is compatible with the all unlocked devices or those that are locked to the EE network
SIM Card - Standard, Micro, and Nano SIM all-in-one with 120GB of data
Brand EE
Roaming is not included
Cellular Technology 4G
Please be advised that the packaging you receive may differ from the packagaing dislayed here
To view EE’s pay as you go pre-service information, visit ee.co.uk/paygservice. Please read before placing your order. You can download or save the document from your browser

EE PAYG MBB 120GB 12 Months SIM (EE PAYG MBB 120GB 12 Months SIM)

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Why We Love It

Generous 120GB data upon activation.
Zero contracts attached.
Comes in all SIM sizes.

Main Highlights

120GB of Data Included
Lasts up to 12 months from activation
No contract, no commitment. You can top-up to buy more data
The EE PAYG 120GB data SIM is compatible with the all unlocked devices or those that are locked to the EE network
SIM Card - Standard, Micro, and Nano SIM all-in-one with 120GB of data
Please be advised that the packaging you receive may differ from the packagaing displayed here
To view EE’s pay as you go pre-service information, visit ee.co.uk/paygservice. Please read before placing your order. You can download or save the document from your browser

Three Unlimited Data SIM – Uncapped 5G Speeds – Preloaded for 1 month from Order – No Contract – Plug & Play for Business Broadband, Routers & Phones

Why We Love It

Unlimited data for one month.
Business-grade 4G & 5G.
No long-term contract required.

Main Highlights

PRELOADED DATA - Unlimited Data for 1 Month 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.
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. A fair use policy of 1000GB per month applies.
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.

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

EE Unlimited Data SIM – Uncapped 5G Speeds – Preloaded for 1 Month from Order – No Contract & Ideal for Short-term Mobile Broadband, Routers & Phones

Why We Love It

Unlimited Data for 1 month.
Effortless plug and play setup.
Dedicated support for your business.

Main Highlights

PRELOADED DATA - Unlimited Data for 1 month for a one-off payment.
EFFORTLESS PLUG & PLAY - Experience seamless 4G & 5G connectivity, no initial setup is required.
UNMATCHED EE NETWORK RELIABILITY - Depend on the UK's leading network for consistent business connectivity.
UNIVERSAL DEVICE COMPATIBILITY - Optimised for Smartphones, Tablets, Laptops, Mobile Wi-Fi Dongles, Routers, IoT Devices, Smart Meters, Vehicles, 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.
NO 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; EE reserve the right to suspend the sim if the allowance is exceeded. This Sim card does not support calls, texts, or roaming.
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 and consent to being listed as a business customer with Scancom Distribution Ltd, a necessary step to complete your purchase.
Sims cannot be ported/transferred, promotions are non-renewable, and support for pre-registered sims is available exclusively via email. Please reach us at support@scancom.co.uk with the sim number and Amazon order reference.

Three 500GB Data SIM – Uncapped 5G Speeds – Preloaded EVERY MONTH Until 8th OCTOBER 2025 – No Contract – Plug & Play for Business Broadband, Routers & Phones

18% OffFree Shipping

Why We Love It

500GB monthly data renewal.
Effortless plug & play.
Zero contracts or fees.

Main Highlights

PRELOADED DATA - 500GB Data renewed monthly until 8th OCTOBER 2025 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 Mobile Pay As You Go Mobile Broadband 24 GB data SIM

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Why We Love It

24GB data lasting 24 months.
5G access at no cost.
Compatible with any unlocked device.

Main Highlights

Pre-loaded with 24GB of data that lasts up to 24 months.
Access to our 5G network – at no extra cost.
Use data in 71 destinations – up to 12GB
SIM fits any unlocked 3G, 4G and 5G device.

EE 150GB Data Sim includes £20 pre-paid credit, 150GB Data, Unlimited Minutes & Unlimited Texts

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Why We Love It

Generous 50GB data allotment.
500MB free on extra packs.
Unlimited calls and texts.

Main Highlights

150GB Data Included, lasts up to 30 days
The sim you receive may be in old style packaging but will include the data allowances as per the description
Roaming is not included
Free Boost - Buy 2 packs and get 2GB free
Unlimited calls and texts
Allowances last up to 30 days from activation
If the purchased pre-paid credit is not immediately available when the sim is put into the device, please message us and include the mobile number as detailed on the back of the packaging.
To view EE’s pay as you go pre-service information, visit ee.co.uk/paygservice. Please read before placing your order. You can download or save the document from your browser.

EE Pay As You Go SIM Card UK PREPAID PAYG £20 Bundle 50GB + (100GB FREE DATA every month for 6 months with regular top ups (Promotion request deadline of 07.10.2025)

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Why We Love It

Free 50GB extra data.
High-speed 4G internet.
WiFi calling included.

Main Highlights

Quick & Easy Sim Activation - FREE 100GB PROMO activate by 07 OCT 2025 – total 150GB
The sim pack you receive will state 50GB on the printed packaging. This will be upgraded to 150GB ‘Extra Data’ promotional offer after activation on our website
Bundle lasts 30 days from activation -BUNDLE DOES NOT INCLUDE EUROPEAN ROAMING. Trio SIM fits any unlocked 4G and above phone or devices locked to EE network. Personal hotspot/tethering allowed
4G speeds up to 25Mbps (No 5G with PAYG). WIFI CALLING + WIFI COVERAGE ON LONDON UNDERGROUND + 150,000 LOCATIONS ACROSS UK
To view EE’s pay as you go pre-service information, visit ee.co.uk/paygservice. Please read before placing your order. You can download or save the document from your browser

Three UK 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)

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Why We Love It

Unlimited 4G/5G data preloaded.
No contracts or commitments.
Compatible with multiple devices.

Main Highlights

PRELOADED DATA: Three UK SIM Card Preloaded with UNLIMITED 4G/5G Data. Enjoy Super-Fast 4G/5G Data Speeds with the UK’s most reliable 5G network. The Data Sim Bundle lasts for 1 month from first use. Easy to renew your bundle for longer.
NO CONTRACTS: The Preloaded Three 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 Three Network 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 Three UK 4G/5G Preloaded Data SIM provides amazing performance without any speed restrictions.
ACTIVATION TIMINGS: Mon-Fri (9-5pm) Activations can take up to 48 hours. Weekends: Activations can take up to 48 hours, processed from the following Monday at 9am

8.7

Excellent

We scanned 338 products

We reviewed these offers relevant to the Unlimited Data Only Sim Card 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 EE, Scancom, Sims4Travel, 3, love 2 surf, Sims4Home, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Unlimited Data Only Sim Card in the market, we considered we took a deep dive into 1691 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 EE PAYG SIM card preloaded with 120GB of Data. We love many things about this product by EE. What sets it apart from the competition is Generous 120GB data included, Valid for a year from activation, No contracts, no commitments.
The best value product for most shoppers and where user satisfaction is continuously the highest is EE PAYG MBB 120GB 12 Months SIM (EE PAYG MBB 120GB 12 Months SIM) by EE based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Unlimited Data Only Sim Card and the best cost-to-value ratio is Three 500GB Data SIM – Uncapped 5G Speeds – Preloaded EVERY MONTH Until 8th OCTOBER 2025 – No Contract – Plug & Play for Business Broadband, Routers & Phonesat Scancom with a 18% discount.
Our list of the best Unlimited Data Only Sim Card 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 Unlimited Data Only Sim Card in The UK

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THREE 4G/5G SIM Card UK & ROAM FREE in over 70 destinations - PREPAID PAYG £10 Bundle - 20GB + (20GB FREE DATA) Unltd Texts & Mins - ROAMING ALLOWANCE 6GB

We scanned 338 products

We concluded that: