Best Nano Sim Cards of 2026

Last updated on 01/01/2026

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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).

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).

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

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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).

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

Value for Money

Lebara Mobile SIM Card with 100GB Data Plan for £10, Half Price for First 3 Months, No Contract, UK Calls, Texts, International Minutes, EU and India Roaming Included

Lebara Mobile SIM Card with 100GB Data Plan for £10, Half Price for First 3 Months, No Contract, UK Calls, Texts, International Minutes, EU and India Roaming Included

No contracts or commitments needed.
Hassle-free sign-up process.
Total control over spending.

Main Highlights

No Contract - 30 day rolling plans, change or cancel anytime.
No Credit Check - Sign up hassle free in less than 60 seconds.
No Bill shocks - Total control on your spend.
Free roaming in the EU & India up to 30GB - Use your UK plan allowance in the EU and India as you would at home.
Pay As You Go - SIM card is pre-loaded with a month's data. Renew at the end of 30 days to keep your plan.

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Lebara Mobile SIM Card with 100GB Data Plan for £10, Half Price for First 3 Months, No Contract, UK Calls, Texts, International Minutes, EU and India Roaming Included

No contracts or commitments needed.
Hassle-free sign-up process.
Total control over spending.

Main Highlights

No Contract - 30 day rolling plans, change or cancel anytime.
No Credit Check - Sign up hassle free in less than 60 seconds.
No Bill shocks - Total control on your spend.
Free roaming in the EU & India up to 30GB - Use your UK plan allowance in the EU and India as you would at home.
Pay As You Go - SIM card is pre-loaded with a month's data. Renew at the end of 30 days to keep your plan.

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

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

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

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

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

Lebara Mobile SIM Card with Unlimited Data Plan for £12.50, Half Price for First 3 Months, No Contract, UK Calls, Texts, International Minutes, EU and India Roaming Included

Lebara Mobile SIM Card with Unlimited Data Plan for £12.50, Half Price for First 3 Months, No Contract, UK Calls, Texts, International Minutes, EU and India Roaming Included

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

Main Highlights

No Contract - 30 day rolling plans, change or cancel anytime.
No Credit Check - Sign up hassle free in less than 60 seconds.
No Bill shocks - Total control on your spend.
Free roaming in the EU & India up to 30GB - Use your UK plan allowance in the EU and India as you would at home.
Pay As You Go - SIM card is pre-loaded with a month's data. Renew at the end of 30 days to keep your plan.

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Lebara Mobile SIM Card with Unlimited Data Plan for £12.50, Half Price for First 3 Months, No Contract, UK Calls, Texts, International Minutes, EU and India Roaming Included

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

Main Highlights

No Contract - 30 day rolling plans, change or cancel anytime.
No Credit Check - Sign up hassle free in less than 60 seconds.
No Bill shocks - Total control on your spend.
Free roaming in the EU & India up to 30GB - Use your UK plan allowance in the EU and India as you would at home.
Pay As You Go - SIM card is pre-loaded with a month's data. Renew at the end of 30 days to keep your plan.

Lebara Mobile SIM Card with 30GB Data Plan for £5, Half Price for First 3 Months, No Contract, UK Calls, Texts, International Minutes, EU and India Roaming Included

Lebara Mobile SIM Card with 30GB Data Plan for £5, Half Price for First 3 Months, No Contract, UK Calls, Texts, International Minutes, EU and India Roaming Included

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

Main Highlights

No Contract - 30 day rolling plans, change or cancel anytime.
No Credit Check - Sign up hassle free in less than 60 seconds.
No Bill shocks - Total control on your spend.
Free roaming in the EU & India up to 30GB - Use your UK plan allowance in the EU and India as you would at home.
Pay As You Go - SIM card is pre-loaded with a month's data. Renew at the end of 30 days to keep your plan.

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Lebara Mobile SIM Card with 30GB Data Plan for £5, Half Price for First 3 Months, No Contract, UK Calls, Texts, International Minutes, EU and India Roaming Included

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

Main Highlights

No Contract - 30 day rolling plans, change or cancel anytime.
No Credit Check - Sign up hassle free in less than 60 seconds.
No Bill shocks - Total control on your spend.
Free roaming in the EU & India up to 30GB - Use your UK plan allowance in the EU and India as you would at home.
Pay As You Go - SIM card is pre-loaded with a month's data. Renew at the end of 30 days to keep your plan.

EE Nano SIM Card (3G/4G Compatible)

EE Nano SIM Card (3G/4G Compatible)

Easy top-up process available.
Flexible bundle options provided.
Triple size SIM card included.

Main Highlights

EE Nano SIM Card (3G/4G Compatible

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EE Nano SIM Card (3G/4G Compatible)

Easy top-up process available.
Flexible bundle options provided.
Triple size SIM card included.

Main Highlights

EE Nano SIM Card (3G/4G Compatible

Giffgaff Nano/Micro/Standard SIM. Top Tariff Offers Unlimited Calls, Text, Data - Just Pay As You Go - no Contract. Multi Size, Fits All Devices. £5 Bonus Credit When You Top up £10 First Time.

Giffgaff Nano/Micro/Standard SIM. Top Tariff Offers Unlimited Calls, Text, Data - Just Pay As You Go - no Contract. Multi Size, Fits All Devices. £5 Bonus Credit When You Top up £10 First Time.

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Giffgaff Nano/Micro/Standard SIM. Top Tariff Offers Unlimited Calls, Text, Data - Just Pay As You Go - no Contract. Multi Size, Fits All Devices. £5 Bonus Credit When You Top up £10 First Time.

OFFICIAL O2 SIMPLE PAY AS YOU GO 02 SIM CARD STANDARD/MICRO/NANO CALLS &TEXTS

OFFICIAL O2 SIMPLE PAY AS YOU GO 02 SIM CARD STANDARD/MICRO/NANO CALLS &TEXTS

No contractual obligations.
Unlimited messaging and calls.
Generous data allowance.

Main Highlights

No Contract To Sign
Unlimited SMS & Calls
7GB of DATA
£10 every 30 days
Will fit all phones/smartphones/GPS devices O2 and network unlocked/sim free phones

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OFFICIAL O2 SIMPLE PAY AS YOU GO 02 SIM CARD STANDARD/MICRO/NANO CALLS &TEXTS

No contractual obligations.
Unlimited messaging and calls.
Generous data allowance.

Main Highlights

No Contract To Sign
Unlimited SMS & Calls
7GB of DATA
£10 every 30 days
Will fit all phones/smartphones/GPS devices O2 and network unlocked/sim free phones

3 in 1 Nano SIM Card Adapter, SIM Card Adapter Kit, Sim Adapter Set Sim Card Adapter with SIM Ejector Pin Compatible with Mobile Phone

3 in 1 Nano SIM Card Adapter, SIM Card Adapter Kit, Sim Adapter Set Sim Card Adapter with SIM Ejector Pin Compatible with Mobile Phone

High quality and durable.
Compatible with all devices.
Includes ejector pin.

Main Highlights

【High Quality Material】SIM card adapter kit made of high quality plastic and stainless steel materials. Lightweight and durable, not easy to bend, long service life.
【Compatible】 The card adapter with SIM ejector pin compatible with Nano SIM and Micro SIM and Standard SIM suitable for all mobile devices Smartphone.
【Package Contents】 One package contains 1Pcs card removal pins and 3pcs SIM card adapter, which you can easily replace.
【Easy to Use】With this SIM card eject pin, you can easily open, remove and eject the SIM card tray.
【After-sales Service】 If you have any questions, please feel free to contact us, we will solve the problem for you within 12 hours.

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3 in 1 Nano SIM Card Adapter, SIM Card Adapter Kit, Sim Adapter Set Sim Card Adapter with SIM Ejector Pin Compatible with Mobile Phone

High quality and durable.
Compatible with all devices.
Includes ejector pin.

Main Highlights

【High Quality Material】SIM card adapter kit made of high quality plastic and stainless steel materials. Lightweight and durable, not easy to bend, long service life.
【Compatible】 The card adapter with SIM ejector pin compatible with Nano SIM and Micro SIM and Standard SIM suitable for all mobile devices Smartphone.
【Package Contents】 One package contains 1Pcs card removal pins and 3pcs SIM card adapter, which you can easily replace.
【Easy to Use】With this SIM card eject pin, you can easily open, remove and eject the SIM card tray.
【After-sales Service】 If you have any questions, please feel free to contact us, we will solve the problem for you within 12 hours.

Lebara Mobile SIM Card with 5GB Data Plan for £2.50, Half Price for First 3 Months, No Contract, UK Calls, Texts, International Minutes, EU and India Roaming Included

Lebara Mobile SIM Card with 5GB Data Plan for £2.50, Half Price for First 3 Months, No Contract, UK Calls, Texts, International Minutes, EU and India Roaming Included

Great savings for three months.
Flexible plan with no contract.
Includes free roaming in multiple regions.

Main Highlights

No Contract - 30 day rolling plans, change or cancel anytime.
No Credit Check - Sign up hassle free in less than 60 seconds.
No Bill shocks - Total control on your spend.
Free roaming in the EU & India up to 30GB - Use your UK plan allowance in the EU and India as you would at home.
Pay As You Go - SIM card is pre-loaded with a month's data. Renew at the end of 30 days to keep your plan.

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Lebara Mobile SIM Card with 5GB Data Plan for £2.50, Half Price for First 3 Months, No Contract, UK Calls, Texts, International Minutes, EU and India Roaming Included

Great savings for three months.
Flexible plan with no contract.
Includes free roaming in multiple regions.

Main Highlights

No Contract - 30 day rolling plans, change or cancel anytime.
No Credit Check - Sign up hassle free in less than 60 seconds.
No Bill shocks - Total control on your spend.
Free roaming in the EU & India up to 30GB - Use your UK plan allowance in the EU and India as you would at home.
Pay As You Go - SIM card is pre-loaded with a month's data. Renew at the end of 30 days to keep your plan.

We scanned 1770 products

We reviewed these offers relevant to the Nano Sim Cards 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 Sims4Travel, Lebara, EE, Giffgaff, O2, CCLKHY, all of which have a reputation for consistently delivering high-quality products that users love and innovative approaches for function & design.

For the best Nano Sim Cards in the market, we considered we took a deep dive into 8851 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 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).. We love many things about this product by Sims4Travel. What sets it apart from the competition is Unlimited 4G/5G data preloaded, No contracts or commitments, Supports free international roaming.
The best value product for most shoppers and where user satisfaction is continuously the highest is Lebara Mobile SIM Card with 100GB Data Plan for £10, Half Price for First 3 Months, No Contract, UK Calls, Texts, International Minutes, EU and India Roaming Included by Lebara based on online reviews by bloggers, experts and online shoppers.
The biggest bargain at the moment for Nano Sim Cards and the best cost-to-value ratio 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).at Sims4Travel with a 11% discount.
Our list of the best Nano Sim Cards 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.