10 Best Unlimited Data Sim Only Deals in the UK

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  PRELOADED DATA - Unlimited Data renewed monthly until 8th December 2025 for a one-off payment.
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  EFFORTLESS PLUG & PLAY Enjoy seamless 4G and 5G connectivity with no initial setup required.
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  THE UKS FASTEST 5G NETWORK Stream, play, watch, work & explore with the power of 5G.
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  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.
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  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.
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  ZERO CONTRACTS - Benefit from our data services without the burden of contracts or recurring fees.
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  VERSATILE TRIPLE CUT SIM - Our all-in-one sim card fits any Standard, Micro, and Nano size device.
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  EXCLUSIVE UK DATA-ONLY - This Sim card does not support calls, texts, or roaming. There is a fair use policy of 1000GB per month.
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  Sims cannot be ported/transferred, promotions are non-renewable, and support for pre-registered sims is available exclusively via email.
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  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.

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  UNLIMITED DATA: Enjoy unrestricted mobile data usage on O2's reliable network with no data caps or speed throttling
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  NO CONTRACT: Freedom to change or cancel your plan anytime with this flexible pay-as-you-go SIM card option
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  NETWORK COVERAGE: Powered by O2 Networks, offering extensive coverage across the UK with strong signal strength
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  MONTHLY COST: £20 per month for unlimited data, providing excellent value for heavy data users
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  COMPATIBILITY: Works with all O2-compatible phones and devices that accept standard SIM cards

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  PRELOADED DATA: Vodafone SIM Card Preloaded with UNLIMITED 4G/5G Data. Enjoy Super-Fast 4G/5G Data Speeds with the UKs most reliable network. The Data Sim Bundle lasts for 1 month from first use. Easy to renew your bundle for longer.
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  NO CONTRACTS: The Preloaded Vodafone Data SIM Card is simple to activate. There are No Contracts, No Commitments, No Credit Checks, No Tie-ins & No Personal ID required.
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  MULTIPLE USES: The Sim comes in a Triple-Sized format, meaning it is suitable for use with all Vodafone or Unlocked Mobile Wi-Fi devices, Routers, Tablets, iPads, Dongles, Laptops, Mobile Phones, CCTV & Alarm systems and more. Tethering & Mobile Hotspots are also supported.
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  SPEED YOU WILL LOVE: Working from Home, Streaming Online, Gaming, Scrolling through Social Media - The Vodafone 4G/5G Preloaded Data SIM provides amazing performance without any speed restrictions.

Main Highlights

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  PRELOADED DATA - Unlimited Data for 1 month for a one-off payment.
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  EFFORTLESS PLUG & PLAY - Experience seamless 4G & 5G connectivity, no initial setup is required.
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  UNMATCHED EE NETWORK RELIABILITY - Depend on the UK's leading network for consistent business connectivity.
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  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.
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  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.
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  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.
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  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.

Main Highlights

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  PRELOADED DATA: O2 SIM Card Preloaded with UNLIMITED 4G/5G Data. Enjoy Super-Fast 4G/5G Data Speeds with the UKs most reliable network. The Data Sim Bundle lasts for 1 month from first use. Easy to renew your bundle for longer
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  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
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  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
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  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
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  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

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  Pre-loaded O2 Sim card with unlimited 4g/5g Data for use in the United Kingdom. Fast 4g/5g Speeds with No Restrictions.
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  Includes 25gb of Data which can be used to Roam Free at no extra cost in the European Union
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  Sim will work in any compatible devices, Routers, Tablets, iPads, Dongles, Laptops, Mobile Phones, CCTV and Alarm Systems
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  SIM card is packaged for all sizes: Nano, Micro and standard SIM card size
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  No Contracts, No Commitments, No Credit Checks
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  SIM cards cannot be activated on weekends or bank holidays. Activation only takes place Monday - Friday

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  50GB Data Included, lasts up to 30 days
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  The sim you receive may be in old style packaging but will include the data allowances as per the description
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  Roaming is not included
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  Free Boost - Buy 2 packs and get 500MB free
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  Unlimited calls and texts
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  Allowances last up to 30 days from activation
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  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.
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  To view EEs 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.

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  SMARTY Unlimited Data Only SIM for £20 a month. Flexible 1 month plan, cancel anytime
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  EU Roaming - 12GB Included within your plan
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  Unrestricted tethering in the UK
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  No speed caps
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  Keep your existing number
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  SIM fits any unlocked 4G or 5G device, not compatible with 3G devices
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  No credit check required.
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  Payment method required to activate. Set up on auto renew for ease
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  Go to smarty.co.uk/activate to activate your SIM
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  SMARTY terms of service apply

Main Highlights

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  SMARTY Unlimited Data, calls and texts SIM for only £20. Flexible 1 month plan, cancel anytime
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  EU Roaming - 12GB Included within your plan
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  Unrestricted tethering in the UK
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  No speed caps
• 
  Keep your existing number
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  SIM fits any unlocked 4G or 5G device, not compatible with 3G devices
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  No credit check required
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  Payment method required to activate. Set up on auto renew for ease
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  Go to smarty.co.uk/activate to activate your SIM
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  SMARTY terms of service apply