10 Best Sim Only Deals Unlimited Data in The UK

Last updated on 16/07/2025

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EE Unlimited 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

Unlimited data until 2026.
Effortless plug and play setup.
Reliable connectivity with EE network.

Main Highlights

PRELOADED DATA - Unlimited Data until 8th NOVEMBER 2026 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 Unlimited Data SIM – Uncapped 5G Speeds – Preloaded EVERY MONTH Until 8th AUGUST 2026 – No Contract – Plug & Play for Business Broadband, Routers & Phones

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Why We Love It

Unlimited data till 2026.
Effortless plug & play.
Zero contracts, no fees.

Main Highlights

PRELOADED DATA - Unlimited Data renewed monthly until 8th August 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. There is a fair use policy of 1000GB per month.
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 80GB Data SIM – Uncapped 5G Speeds – Preloaded EVERY MONTH Until 8th JANUARY 2027 – No Contract – Plug & Play for Business Broadband, Routers & Phones

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Why We Love It

Generous 80GB data monthly.
Instant connectivity, no setup.
Portable Wi-Fi hub feature.

Main Highlights

PRELOADED DATA - 80GB Data renewed monthly until 8th January 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 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 OCTOBER 2025 – No Contract – Plug & Play for Business Broadband, Routers & Phones

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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.

SMARTY Unlimited Data only SIM. 1 month plan, No contract, EU Roaming

43% OffFree Shipping

Why We Love It

Unlimited data for £20/month.
EU roaming included.
No speed caps.

Main Highlights

Unlimited data-only SIM for just £20 a month.
You’re free to leave at the end of the month: Commitment-free with no long contract.
No annual price rises: You won’t be shocked with a higher bill at the end of the month.
EU roaming up to 12GB included: Enjoy your EU travels without being hit with extra charges.
Switch effortlessly: Keep your existing number, no need to remember a new one.
No credit check: No hassle.
SIM fits any unlocked 4G or 5G device, not compatible with 3G devices.
How to activate this SIM: Head on over to smarty.co.uk/activate, choose the plan you want and pay on activation. Auto-renew set up for ease, you can pause, change, or cancel the plan on your dashboard.

SMARTY Sim Unlimited Data for £20

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Why We Love It

Affordable plans for everyone.
Flexibility with monthly cancellation.
Enjoy unlimited calls and texts.

Main Highlights

Unlimited data SIM for just £20 a month.
You’re free to leave at the end of the month: Commitment-free with no long contract.
No annual price rises: You won’t be shocked with a higher bill at the end of the month.
EU roaming up to 12GB included: Enjoy your EU travels without being hit with extra charges.
Switch effortlessly: Keep your existing number, no need to remember a new one.
No credit check: No hassle.
SIM fits any unlocked 4G or 5G device, not compatible with 3G devices.
How to activate this SIM: Head on over to smarty.co.uk/activate, choose the plan you want and pay on activation. Auto-renew set up for ease, you can pause, change, or cancel the plan on your dashboard.

Smarty SIM Exclusive Student Unlimited Data Deal, Affordable, Straight Forward and no hassle

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Why We Love It

Exclusive student pricing available.
Unlimited calls and texts.
Robust 3G and 4G coverage.

Main Highlights

Unlimited data-only SIM for just £20 a month.
You’re free to leave at the end of the month: Commitment-free with no long contract.
No annual price rises: You won’t be shocked with a higher bill at the end of the month.
EU roaming up to 12GB included: Enjoy your EU travels without being hit with extra charges.
Switch effortlessly: Keep your existing number, no need to remember a new one.
No credit check: No hassle.
SIM fits any unlocked 4G or 5G device, not compatible with 3G devices.
How to activate this SIM: Head on over to smarty.co.uk/activate, choose the plan you want and pay on activation. Auto-renew set up for ease, you can pause, change, or cancel the plan on your dashboard.

Lebara UK Pay As You Go SIM Card - 5GB Data, 1000 UK Minutes & Texts, 100 International minutes for £5

25% Off

Why We Love It

Pre-loaded plan, ready to use.
No contract, cancel anytime.
Keep your existing number.

Main Highlights

Plan is Pre-loaded and ready to use
1 month plan. No contract. Change or cancel anytime
50% Off for 3 months when you renew
No Credit Check
Keep your existing number

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

8.8

Excellent

We scanned 481 products

We reviewed these offers relevant to the Sim Only Deals Unlimited Data 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, SMARTY, Lebara, 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 Sim Only Deals Unlimited Data in the market, we considered we took a deep dive into 2406 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 Unlimited Data SIM – Uncapped 5G Speeds – Preloaded EVERY MONTH Until 8th NOVEMBER 2026 – No Contract – Plug & Play for Business Broadband, Routers & Phones. We love many things about this product by Scancom. What sets it apart from the competition is Unlimited data until 2026. , Effortless plug and play setup. , Reliable connectivity with EE network. .
The best value product for most shoppers and where user satisfaction is continuously the highest is Three Unlimited Data SIM – Uncapped 5G Speeds – Preloaded EVERY MONTH Until 8th AUGUST 2026 – 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 Sim Only Deals Unlimited Data and the best cost-to-value ratio is SMARTY Unlimited Data only SIM. 1 month plan, No contract, EU Roamingat SMARTY with a 43% discount.
Our list of the best Sim Only Deals Unlimited Data 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 Sim Only Deals Unlimited Data in The UK

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Love Mobile Data Only Sim Card - International Multi-Network 4G/5G Prepaid Pay As You Go Data Sim for Mobile Phones, WiFi Routers, & More, UK & France Coverage, 5GB for 60 Days

Lebara UK Unlimited Data Pay As You Go SIM Card, Unlimited UK Minutes & Texts, 100 International minutes for £25

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We scanned 481 products

We concluded that: