10 Best Prepaid Data Sim in The UK

Last updated on 01/09/2025

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Three 25GB Data SIM - Uncapped 5G - Preloaded MONTHLY Until February 2027 - Plug & Play for Routers & Phones - Access to Three & Vodafone - Connects to the Strongest Signal available

Free Shipping

Why We Love It

Instant connectivity with no setup.
Automatically refreshed monthly data.
No contract or monthly fees.

Main Highlights

DUAL NETWORK - Automatic access to both Three & Vodafone networks. Disclaimer - Coverage provided via MOCN, a multi-operator core network, in selected geographical areas. Please check coverage availability before purchase.
MONTHLY DATA RENEWAL - 25GB Data monthly until 8th February 2027 for a one-off payment.
EFFORTLESS PLUG & PLAY – Enjoy seamless 4G and 5G connectivity with no initial setup required.
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 Unlimited Data SIM - Uncapped 5G - Preloaded MONTHLY Until January 2026 - Plug & Play for Routers & Phones - Access to Three & Vodafone - Connects to the Strongest Signal available

50% OffFree Shipping

Why We Love It

Unlimited data until 2026.
Effortless plug and play setup.
Compatible with various devices.

Main Highlights

DUAL NETWORK - Automatic access to both Three & Vodafone networks. Disclaimer - Coverage provided via MOCN, a multi-operator core network, in selected geographical areas. Please check coverage availability before purchase.
MONTHLY DATA RENEWAL - Unlimited Data until 8th January 2026 for a one-off payment.
EFFORTLESS PLUG & PLAY – Enjoy seamless 4G and 5G connectivity with no initial setup required.
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. 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.

EE PAYG SIM card preloaded with 120GB of Data

18% OffFree Shipping

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

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

Free Shipping

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

Three Mobile Pay As You Go Mobile Broadband 24 GB data SIM

Free Shipping

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.

Three PAYG Mobile Broadband SIM, Pre-loaded with 120GB of Data that Lasts up to 12 Months

25% OffFree Shipping

Why We Love It

Convenient 120GB data package.
Lightning-fast 5G network access.
Global coverage in 71 destinations.

Main Highlights

Pre-loaded with 120GB of data that lasts up to 12 months.
Access to our 5G network
Use data in 71 destinations – up to 2GB per month
SIM fits any unlocked 4G and 5G device.

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

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Why We Love It

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

Main Highlights

THE PLAN: 12GB to use anytime within 365 days (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.
PLUS, EXTRA: 5G coverage and 10-year SIM card replacement at no additional cost.

Three 500GB Data SIM - Uncapped 5G - Preloaded MONTHLY Until October 2025 - Plug & Play for Routers & Phones - Access to Three & Vodafone - Connects to the Strongest Signal available

29% OffFree Shipping

Why We Love It

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

Main Highlights

DUAL NETWORK - Automatic access to both Three & Vodafone networks. Disclaimer - Coverage provided via MOCN, a multi-operator core network, in selected geographical areas. Please check coverage availability before purchase.
MONTHLY DATA RENEWAL - 500GB Data monthly until 8th October 2025 for a one-off payment.
EFFORTLESS PLUG & PLAY – Enjoy seamless 4G and 5G connectivity with no initial setup required.
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.

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).

15% OffFree Shipping

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

Three Mobile Pay As You Go Mobile Broadband 12 GB data SIM

18% OffFree Shipping

Why We Love It

Pre-loaded with 12GB data.
Access to 5G network.
Applicable in 71 destinations.

Main Highlights

Pre-loaded with 12GB of data that lasts up to 12 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.

9.0

Superb

Save 18%

We scanned 623 products

We reviewed these offers relevant to the Prepaid Data Sim 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, EE, 3, Wave Connect, Sims4Travel, Three Mobile, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Prepaid Data Sim in the market, we considered we took a deep dive into 3116 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 Three 25GB Data SIM - Uncapped 5G - Preloaded MONTHLY Until February 2027 - Plug & Play for Routers & Phones - Access to Three & Vodafone - Connects to the Strongest Signal available. We love many things about this product by Scancom. What sets it apart from the competition is Instant connectivity with no setup, Automatically refreshed monthly data, No contract or monthly fees.
The best value product for most shoppers and where user satisfaction is continuously the highest is Three Unlimited Data SIM - Uncapped 5G - Preloaded MONTHLY Until January 2026 - Plug & Play for Routers & Phones - Access to Three & Vodafone - Connects to the Strongest Signal available by Scancom based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Prepaid Data Sim and the best cost-to-value ratio is Three Unlimited Data SIM - Uncapped 5G - Preloaded MONTHLY Until January 2026 - Plug & Play for Routers & Phones - Access to Three & Vodafone - Connects to the Strongest Signal availableat Scancom with a 50% discount.
Our list of the best Prepaid Data Sim 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 Prepaid Data Sim in The UK

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We scanned 623 products

We concluded that: