SIM deals for phones

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Data Only SIM deals

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3 SIM Only Deals
SIM Only
4GB data Unlimited minutes Unlimited texts
£6.00 a month
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Advanced SIM Only Plan. 12 month contract.
Cheap SIM Only Deals
SIM Only
30GB data Unlimited minutes Unlimited texts
£9.00 a month
See Deal
Advanced SIM Only Plan. 12 month contract.
SIM Only deal
SIM Only
100GB data Unlimited minutes Unlimited texts
£12.00 a month
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Advanced SIM Only Plan. 12 month contract.
SIM Only deal
SIM Only
Unlimited data Unlimited minutes Unlimited texts
£16.00 a month
See Deal
Advanced SIM Only 30 Days Plan. 12 month contract.

Browse all SIM plans

What is a SIM Only deal?

A SIM Only deal offers you a bundle of minutes, texts and data just like a standard mobile phone contract. However, you don't get a smartphone, you only get a SIM card included, which enables you to save money and can also mean a shorter contract.

Why would I choose a SIM only plan?

One of the main reasons to choose a SIM Only plan is to save money. SIM Only plans are cheaper because the operators don't have to offset the cost of a mobile phone, enabling you to get more minutes, data and texts for less. 

SIM Only plans contracts also have shorter contract lengths than standard 24-month mobile contracts. 1-month, 12-month or 24-month SIM contracts are available, or you can even choose a Pay As You Go SIM card for even more flexibility.

One final benefit of SIM only plans is they have less strict credit checks compared to pay monthly phone contracts. Making them great for those with bad-credit, or those worried about their credit score being impacted by refusals.

Why choose a Three SIM Only deal?

Three SIM Only deals are some of the cheapest available and come with a host of extras you won't get on other networks.

Firstly, all plans are 5G Ready at no extra cost. When 5G becomes available in your area you will be able to enjoy the superfast speeds it brings and until then you can still access Three's 4G network.

Three also offer truly unlimited data plans with no speed caps or usage limits. While, roaming is included on all plans in the EU at no extra cost, while Advanced plans come with worldwide roaming in 71 destinations.

Personal Hotspot (or Tethering) is included on all plans enabling you to share internet with other devices over WiFi. Similarly, all plans support WiFi calling, 4G Super Voice (or VoLTE) and come with free WiFi on the London Underground.

Frequently Asked Questions

Can I get a SIM Only contract for my phone?

Yes. Three’s SIM Only plans are available for all handsets, and all SIM card sizes are also provided. The only thing you’ll have to check is that your phone isn’t locked to a different network.

Can I keep my existing number when switching to SIM Only?

Yes. You can quickly and easily bring over your existing number to Three SIM Only. Check out our full guide to keeping your number to find out how.

Can I get a Data Only SIM for my tablet, dongle or Mobile WiFi device?

Yes. Three offers Data Only SIM plans which are ideal for tablets, dongles and Mobile WiFi. These come with data but without any minutes or texts, and come on 1-month or 12-month contracts with up to 100GB of data.

Can I get a Pay As You Go SIM card on Three?

Yes. Three offers free Pay As You Go phone SIMs and charges just 3p per minute, 2p per text or 1p per megabyte of data to use them.

Alternatively, you can turn your credit into an add-on, giving you a bundle of minutes, texts and data, right up to unlimited data, 3000 minutes and 3000 texts for £35, valid for 30 days. By buying a bundle you also get to enjoy Go Roam Around The World, so you can use allowances free in 71 countries.

Are unlimited data SIM Only plans available on Three?

Yes, SIM cards with truly unlimited data are available on Three with no speed caps or restrictions. They are available on 1-month, 12-month or 24-month plans and come with 5G at no extra cost, Go Binge, tethering included and free roaming abroad in 71 countries.

Can you tether with a SIM Only plan on Three?

Tethering, or a personal hotspot, is included with all Advanced Plans, allowing you to use your data to get other devices online. You can use all or any of your data tethering.

Tethering is also included on Pay As You Go plans, but a fair usage policy of 15GB per month applies.

Is it possible to get a free Three SIM card?

Yes, you can order a free SIM for a mobile phone, or a free data reward SIM for your tablet or mobile broadband device. When it arrives simply activate it and top-up with credit and away you go.

Which size SIM card do I need?

The size of SIM card you need depends on the device you have. There are 3 SIM types (Standard, Micro and Nano), but the good news is that when you order a Three SIM card you’ll get a trio-SIM which gives you all 3 SIM types in one.

Then, you just pop out the one you want, selecting from the following options:

  • Trio SIM

All SIM plans for phones on Three come with a Trio SIM (Standard, Micro and Nano), so you don't need to worry about which type of SIM you need.

  • Standard SIM

For use in the majority of old smartphones phones and the majority of mobile broadband and Mobile WiFi dongles.

  • Micro SIM

For use in many slightly newer smartphones including the iPhone 4S and Samsung Galaxy S5. Popular tablets with a micro SIM include the Apple iPad, Apple iPad 2 and the Apple iPad 4. 

  • Nano-SIM

For use in most of the latest smartphones including the iPhone 11 Pro, iPhone 11, iPhone Xs, iPhone Xr, iPhone X, iPhone 8, Samsung Galaxy S10 and Huawei Mate 20. Along with the latest tablets including the iPad Pro 10.5, iPad Pro 12.9, iPad Air 2 and iPad Mini 4.


EPIC SIM OFFER 100GB data £12 a month See Deal