Three SIM Only

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Three Clearance SIM Only Plans


Three SIM Only

If you already have a handset you love and don’t want to pay the price for a new one, a SIM only plan from Three is the best option. You can keep your current handset and take advantage of our great value deals for minutes, texts and data. And with a Three SIM-Only plan, you have full access to Three's 4G network for no extra cost. If your area has 4G coverage and your device is compatible, you can take advantage of super speedy internet on your mobile with a great value All-You-Can-Eat data plan on Three (which includes a whopping 8GB tethering allowance!).


Why choose Three for your SIM only needs?


4G for the price of 3G: Three are upgrading all 3G customers to 4G speeds at no extra cost, providing you have a 4G-ready handset. Fully flexible plans: Whatever your requirement for minutes, texts and data, we have a range of plans to suit everyone.
Keep the handset you love: Keeping your phone saves you both money and hassle, and we will even help you keep your old number, too. Commitment length to suit you: Our range of 30 day and 12 month SIM only contracts are perfect if you don’t want the hassle of a longer contract.
Feel at home: Use your allowance to call and text the UK, from 18 countries around the wold, and use data without paying a penny more.  


How to get started:

  1. Choose which SIM type you need for your handset
  2. Decide on either a 12-month contract or a 30-day rolling contract for maximum flexibility
  3. Pick your allowance levels for minutes, texts and data
  4. Order the SIM & wait a day for delivery
  5. Enjoy your new, great-value tariff


I have questions about SIM options!

That’s great – simply take a look at our FAQ section below. If you can’t find the answer you’re looking for here, simply get in touch with us via the Contact Us page, and we’ll be happy to answer any queries you have.



What is a SIM card?

SIM stands for ‘Subscriber Identity Module’. It is the small card that slots into your handset, and contains your account information and personal number. It allows your handset to connect to a mobile network so that it can then make calls, send texts, and use the internet. SIM cards can also be used to store (limited) amounts of data, such as phone numbers and some text messages.


I'd like a Pay As You Go SIM, but I need a handset too! What do I do?

If you need a handset but don't want to be locked into a monthly plan, you can take a look at our great PAYG handsets. Purchasing a mobile phone outright to use with a SIM may be a particularly good option if you're not keen on a monthly bill, or you're waiting for your favourite manufacturer's newest flagship to be released.


Does my handset have to be unlocked?

In order to use a SIM card (which is automatically linked to your chosen network), your handset must either be completely unlocked, or purchased from the same network. If your current handset was not purchased from three, and are unsure as to whether it is unlocked, the best thing to do would be to get in touch with your old network to check. At Three, all of our handsets are now sold unlocked, giving you more freedom after your contract ends.


Are the SIM Only contracts as flexible as regular tariffs?

Regular tariffs tend to have a contract length of 24 months, whereas our SIM only tariffs range from 1 month (rolling) contracts, to 12 months, to 24 months. And our SIM only tariffs are both varied enough to suit any type of mobile phone user, and at great prices to ensure the very best value.


Can I use any SIM in my handset?

Depending on the type of phone you have, you will need one of three SIM types: Standard, Micro or Nano. If you are unsure which SIM you require, simply look at the handset manufacturer’s website.


Why are SIM sizes different?

The reason for different SIM sizes is simply due to individual handsets. As with most technologies, mobile phones are getting slimmer and more compact, whilst gaining greater processing power, generally speaking. In an attempt to save space, manufacturers have been able to cut the size of SIM cards, while still retaining all of the information they are able to hold. For this reason, a good rule of thumb is the newer the handset, the smaller the SIM required. This isn’t always the case however, so it’s always a good idea to check with the manufacturer as to what size you need before purchasing.


What do the plans include?

Our SIM plans all include the physical SIM (and, of course, the phone number to go along with it if you do not wish to keep your old number), as well as a generous allowance of minutes, texts and data. Some of the plans offer added benefits such as tethering and free Three-to-Three minutes.


Do I need a special 4G SIM card?

As long as you have a 4G-ready device, you will be upgraded to 4G as soon as it is rolled out in your area. So there will be no need to deal with trying to get a new SIM in order to access amazingly fast internet speeds on Three.