Compare unlimited SIM only deals
Compare the latest unlimited SIM only deals, plans and tariffs from the leading mobile providers. Our comparison includes prices, contracts, data, and much more.
Unlimited SIM only deals explained
SIM-only deals enable you to put together your own mobile package, pairing the handset of your choice with the right airtime deal. Doing this can save you money – what’s not to like?
Only two providers offer truly unlimited SIM only deals: Three, and Virgin Mobile, which reserves its unlimited deal for its broadband and TV customers. We’ve looked at some of the best deals out there, what you get for your money and how long you need to sign up for.
How do SIM only deals work?
You need to provide your own handset. SIM only deals are best suited for people who aren’t bothered about upgrading their handset every five minutes. But saying that, you might want to pay for a fancy handset outright then pair it with a cheap SIM deal – you can sometimes save money this way compared to buying a handset + airtime contract. Either way, your handset needs to be unlocked to work with a SIM only deal.
Do I need an unlimited deal?
To be honest, probably not unless you’re literally permanently glued to your phone. According to giffgaff, the average UK mobile user will use 2.32GB a month in 2018. To be on the safe side, check your bills and see how much data you use. There’s no point paying for data you’ll never use, and the same goes for calls and texts.
How can I save money?
You need to find the right deal for you. In general, deals which require a 12-month commitment are cheaper each month than those on 30-day rolling terms. Your data allowance is probably the most important as you can use wi-fi calling instead of call minutes, and messaging apps such as WhatsApp and Facebook Messenger instead of texts. To keep your data use down, set up your phone so it automatically logs on to wi-fi at home, work and other places you regularly go.
What’s the best SIM only deal for travellers?
EU rules mean you no longer have to pay roaming charges in the 28 EU member states, plus Norway, Iceland and Liechtenstein. But if you take regular trips further afield, then Three is undoubtedly the best option as Feel At Home Around The World means you can use your monthly allowances in 71 destinations worldwide. It’s not designed for people who live abroad though. If you’re permanently overseas, it's worth getting a local SIM. If you have a dual-SIM phone you can use both SIMs in the same handset at the same time.
What’s an MVNO?
A MVNO is a mobile virtual network operator. This means the mobile company doesn’t own its own network but piggybacks on another network. For example, giffgaff uses O2, Virgin Mobile uses EE, and Smarty piggybacks on Three. MVNOs will often, but not always, offer cheaper SIM only deals than the main networks (O2, EE, Vodafone and Three).