10 Best Sim Card in The UK

Last updated on 31/08/2025

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Best Choice

9.7

Exceptional

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

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

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

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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.

EE PAYG £10 Data Sim Includes £10 pre-paid credit, 8GB Data, 500 Minutes and Unlimited Texts (EE £10-20GB)

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Why We Love It

Generous data and call allowances.
Attractive bonus on multiple purchases.
Fast 4G cellular technology.

Main Highlights

20GB Data included, lasts up to 30 days
The packaging you receive may differ from the image displayed but the data you receive will be as detailed above
Roaming is not included
Free Boost - Buy 2 packs and get 2GB free
500 minutes and unlimited texts
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

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

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Why We Love It

Generous data bundle with auto-renew.
Global roaming in 70 destinations.
Fastest 5G network in UK.

Main Highlights

Quick & Easy Sim Activation - FREE 20GB PROMO – total 40GB
Bundle lasts 30 days from activation. NOTE: CREDIT WILL BE ZERO - allocated to bundle allowance
Travelling abroad - GO ROAM in over 70 destinations (includes EUROPE) - ROAMING ALLOWANCE 6GB, calls and texts to UK numbers only
UK’s fastest 5G network -Trio SIM fits any unlocked 4G and 5G device. Personal hotspot/tethering allowed
INTERNATIONAL CALLING SERVICE TO USE WITH SIM - E.g. USA - 0.3p/min and EU - 0.3p/min (optional extra)

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

Lebara SIM Card, Unlimted Data SIM for £12.50, Half Price for First 3 Months, No Contract, UK Calls, UK Texts and International Calls Included, Multi-size, Fits All Devices

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Why We Love It

Huge savings for three months.
Convenient pre-loaded plan available.
Flexibility to change anytime.

Main Highlights

Register to activate your promotion.
Plan is Pre-loaded and ready to use.
30-day rolling plan. No contract. Change or cancel anytime.
Keep your existing number.
EU and India roaming included.

EE Pay As You Go SIM Card UK PREPAID PAYG £10 Bundle 8GB + (12GB 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 12GB data promo.
Trio SIM fits any device.
4G speeds and WiFi calling.

Main Highlights

Quick & Easy Sim Activation - FREE 12GB PROMO activate by 07 OCT 2025 – total 20GB
The sim pack you receive will state 8GB on the printed packaging. This will be upgraded to 20GB ‘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

O2 SIM Card UK & EUROPE (ROAM FREE) PREPAID PAYG £10 Bundle -8GB + Unltd Texts & Mins - ROAMING ALLOWANCE 8GB + International Calling Option - (Love2surf RETAIL PACK)

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Why We Love It

Convenient prepaid bundle.
Roaming within EU zone.
Affordable international calls.

Main Highlights

QUICK & EASY SIM ACTIVATION - 8GB
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)

Lebara SIM Card: 25GB for £5, Half Price for First 3 Months, No Contract, UK Calls, UK Texts and International Calls Included, Multi-size, Fits All Devices

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Why We Love It

50% Off for three months.
Pre-loaded plan for convenience.
No contract, change anytime easily.

Main Highlights

Register to activate your promotion.
Plan is Pre-loaded and ready to use.
30-day rolling plan. No contract. Change or cancel anytime.
Keep your existing number.
Roam like home in the EU and India.

8.7

Excellent

We scanned 1936 products

We reviewed these offers relevant to the 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, Sims4Travel, Scancom, love 2 surf, Lebara, 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 Card in the market, we considered we took a deep dive into 9681 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 MBB 120GB 12 Months SIM (EE PAYG MBB 120GB 12 Months SIM). We love many things about this product by EE. What sets it apart from the competition is Generous 120GB data upon activation, Zero contracts attached, Comes in all SIM sizes.
The best value product for most shoppers and where user satisfaction is continuously the highest is 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). by Sims4Travel based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Sim Card and the best cost-to-value ratio is 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 availableat Scancom with a 50% discount.
Our list of the best 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 Sim Card in The UK

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We scanned 1936 products

We concluded that: