10 Best Sim Cards Pay As You Go Unlimited Data in The UK

Last updated on 17/07/2025
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Best Choice
1
9.9
Exceptional
Save 18%
EE PAYG SIM card preloaded with 120GB of Data
EE
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
  • 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
9.9
Exceptional
Save 18%
Amazon Logo
Best Value
2
9.8
Exceptional
EE PAYG MBB 120GB 12 Months SIM (EE PAYG MBB 120GB 12 Months SIM)
EE
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
  • 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
9.8
Exceptional
Amazon Logo
3
9.7
Exceptional
Three Mobile Pay As You Go Mobile Broadband 24 GB data SIM
3
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.
9.7
Exceptional
Amazon Logo
4
9.5
Superb
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
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).
Free 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
9.5
Superb
Amazon Logo
5
9.4
Superb
Save 6%
Three by Three Mobile Data Pay As You Go SIM, Unlimited
3 MOBILE
Three by Three Mobile Data Pay As You Go SIM, Unlimited
6% Off
Why We Love It
  • Offers unlimited data, texts, minutes.
  • Ensures connectivity during travels.
  • Compatible with any unlocked phone.
Main Highlights
  • Included components: SIM Card. Wireless communication technology: Cellular.
9.4
Superb
Save 6%
Amazon Logo
6
9.3
Superb
EE PAYG £10 Data Sim Includes £10 pre-paid credit, 8GB Data, 500 Minutes and Unlimited Texts (EE £10-20GB)
EE
EE PAYG £10 Data Sim Includes £10 pre-paid credit, 8GB Data, 500 Minutes and Unlimited Texts (EE £10-20GB)
Free Shipping
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
  • 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
9.3
Superb
Amazon Logo
7
9.1
Superb
Save 4%
EE Pay As You Go SIM Card UK PREPAID PAYG £15 Bundle 25GB + (50GB FREE DATA every month for 6 months with regular top ups (Promotion request deadline of 07.10.2025)
love 2 surf
EE Pay As You Go SIM Card UK PREPAID PAYG £15 Bundle 25GB + (50GB FREE DATA every month for 6 months with regular top ups (Promotion request deadline of 07.10.2025)
4% OffFree Shipping
Why We Love It
  • Provides extensive wifi coverage in UK.
  • Offers affordability in international calling.
  • Compatible with multiple unlocked devices.
Main Highlights
  • Quick & Easy Sim Activation - FREE 50GB PROMO activate by 07 OCT 2025 – total 75GB
  • The sim pack you receive will state 25GB on the printed packaging. This will be upgraded to 75GB ‘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
9.1
Superb
Save 4%
Amazon Logo
8
8.9
Excellent
Save 4%
Lebara UK Unlimited Data Pay As You Go SIM Card, Unlimited UK Minutes & Texts, 100 International minutes for £25
Lebara
Lebara UK Unlimited Data Pay As You Go SIM Card, Unlimited UK Minutes & Texts, 100 International minutes for £25
4% OffFree Shipping
Why We Love It
  • Pre-loaded plan ready to use.
  • Cancel or change 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
8.9
Excellent
Save 4%
Amazon Logo
9
8.9
Excellent
THREE pay as you go SIM Card UK - comes with 40 GB + Unltd Texts & Mins & ROAM FREE in over 70 destinations - - ROAMING ALLOWANCE 6GB
talk all day
THREE pay as you go SIM Card UK - comes with 40 GB + Unltd Texts & Mins & ROAM FREE in over 70 destinations - - ROAMING ALLOWANCE 6GB
Free Shipping
Why We Love It
  • Full 20 GB allowance available.
  • 30-day bundle duration.
  • Roam freely in Europe.
Main Highlights
  • To get the full 40 GB allowance
  • 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
  • you need to activate the allowance (instructions enclosed)
8.9
Excellent
Amazon Logo
10
8.7
Excellent
EE Pay As You Go Sim Card comes With 20 GB 500 minutes and unlimited texts
talk all day
EE Pay As You Go Sim Card comes With 20 GB 500 minutes and unlimited texts
Free Shipping
Why We Love It
  • Generous 20GB data allowance.
  • Includes 500 minutes calling.
  • Unlimited texts included.
Main Highlights
  • 8GB PLUS 12 GB PROMOTIONAL DATA WITH 500 MINUTES AND UNLIMITED TEXTS FOR 30 DAYS
  • have to follow the instructions to activate the allowances
  • 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
  • have to follow the instructions to activate the allowances
8.7
Excellent
Amazon Logo

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We scanned 338 products

We reviewed these offers relevant to the Sim Cards Pay As You Go 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 EE, 3, Sims4Travel, 3 MOBILE, love 2 surf, Lebara, talk all day, 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 Cards Pay As You Go Unlimited Data 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 Sim Cards Pay As You Go Unlimited Data and the best cost-to-value ratio is EE PAYG SIM card preloaded with 120GB of Dataat EE with a 18% discount.
  • Our list of the best Sim Cards Pay As You Go 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.