Over the past few years, SIM only contracts have seen something of a resurgence. These SIM-only deals enable you to move networks easily and give you great value for money; they're available either on a 12-month basis or even rolling monthly plans.
These SIM-only arrangements are also ideal if your contract is up and you want to save money by not upgrading to a new phone. They're also great if you'd rather buy a mobile phone SIM free - such as the new OnePlus 6T, Apple iPhone XR or Pixel 3.
The best SIM Only deals available today
On this page we'll bring you the best SIM only deals selected from EE, Three, Vodafone, O2, Giffgaff and more, all saving you the time and effort of hunting around for these very offers.
The best deal for heavy data users
• Three is offering a massive 100GB of data for £20 a month with unlimited minutes and texts. That's a huge amount and will cater for all your downloading needs, and with free data for Netflix, Apple Music, Snapchat, Deezer and more. View the deal
The best offer for medium data users
• iD Mobile has a 10GB data allowance costing £13 a month, with unlimited minutes/texts. It's a good deal of data for most that aren't exceptional heavy data users, and there's also data rollover on unused amounts. See the deal
• Three's 30GB data deal for £17 a month comes with unlimited minutes and unlimited texts. That's on the Go Binge plan, with free data for Snapchat, Netflix, Apple Music, Deexer and more. View the deal
The best deal for low data users
• ID Mobile also has 1GB of data for £5 a month with 500 minutes and unlimited texts. That's a great entry-level SIM, with unused data rolling over to the next month and it's also the best value 30-day rolling SIM-only deal, too. View the deal
• Vodafone has a 1GB 3GB data allowance for £8 a month, with UL mins/texts. This is a good deal for those that want a little bit more than the ID Mobile offering. See the deal
Compare the best SIM only deals
Couldn't find a SIM deal above? Here you can compare all the best SIM only deals available right now. You can use the sliders and menus to choose the best deal that suits your needs.