Best SIM Only deals.
We offer a range of SIM Only deals to choose from. Whether it's a 1 month or 12 month SIM Only deal you're looking for, we have it covered. All our SIM deals include all-you-can-eat texts and 4G at no extra cost. Our Advanced Plans include the added benefit of Personal Hotspot allowance and Feel At Home, which lets you use your phone abroad at no extra cost. Take a look at our Pay Monthly SIM plan or our Pay As You Go SIMs range to find the perfect one for you.
We’ve doubled the size of our network over the past 8 years, and cover 98% of the UK population. We're also the first and only network to offer 4G at no extra cost. Check our coverage and network status map to see what coverage is like in your area.
Phone manufacturers on Three.
Three sells a number of phones from HTC, Samsung, Windows, LG, Huawei, Sony and the Apple iPhone. Whether you’re looking for a pay monthly SIM or a Pay As You Go deal, you’ll have plenty of mobile phones to choose from.
Tablets on Three.
As well as selling phones, we also sell a range of tablets from manufacturers such as Apple, Samsung and LG. We have a number of tablet SIM deals to go alongside your choice of tablet. With our data only SIM cards, you get the benefits of Feel At Home too so you don’t have to worry about data roaming fees when using your tablet while in a Feel At Home destination.
What is SIM Only?
SIM Only is a SIM that doesn’t come with a phone or tablet but includes calls, text and data. If you're happy with your current phone or tablet and are not looking to get a new one, a SIM Only contract is a great option for you. It will work on any phone or tablet as long as they're unlocked or on the network you want to use the SIM on. If you get a SIM Only deal, the contract time is usually shorter which means you have the flexibility to change plans more often.
What to do with your old SIM.
Make sure anything that is saved on your SIM is backed up. This could be anything from phone contacts to text messages. Once you’ve got everything that was saved on your SIM, you should then cut up/remove the gold foil on the SIM. This prevents the SIM from working, which then makes it safe to throw away. Once done, you can throw the SIM away.
Which SIM Size do I need?
There are three SIM sizes to choose from: Standard SIM, Micro SIM and Nano SIM. Most newer phones take a Nano SIM, while the majority of older phones take a Micro SIM. Some non-smartphones do still take a Standard SIM, though. Check the box or manual of your phone to see which SIM you need. Alternatively, check which SIM size you need here.
How to keep your existing number.
It’s really easy. Simply ask your current network for your PAC (porting authorisation code) via their site or by calling them. You can follow the step-by- step process on our bringing your number to Three guide. The PAC code is given for free and is usually given within 24 hours. Once the PAC has been received, you then need to fill in the number moving form on Three and depending on the time you put through the request, your number can be ported the very next day (excluding weekends).