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Check out our best SIM only deals here at Tesco Mobile. Whether you’re after SIM only deals with unlimited data or cheap SIM only deals, you’ll find the best SIM only contract for you. Choose the amount of data and contract length that you want, and get unlimited minutes and texts thrown in.
Fancy a pay as you go SIM instead of a SIM only contract? Then take a look at our pay as you go SIM deals.
Unlimited data SIM only contracts
Want to enjoy the freedom of streaming, video calling and more, without having to hunt for Wi-Fi or worry about running out of data? Then an unlimited data SIM could be just for you. Why not use our data calculator to check if unlimited data is what you need?
Pay monthly SIM cards with roaming
Looking for the best SIM only deals with roaming? Grab one of our pay monthly SIMs and you can enjoy no EU roaming fees until 2026. With Home From Home, you can tap into your UK allowances for free in 48 destinations in the EU and beyond, so you can chase the sun around the pool, not the Wi-Fi.
Our cheapest SIM only deals
Got a Clubcard? Then you can get your hands on some of our cheapest SIM only deals with Clubcard Prices. If you bag a SIM only contract on a Clubcard Price deal, not only will you unlock instant savings, we’ll also freeze your basic monthly usage price for the length of your contract. Plus, you can collect Clubcard points and use Clubcard vouchers.
Don’t have a Clubcard yet? It’s free, quick and easy to join – and you’ll get a Clubcard number straight away. Join Clubcard
Want a SIM only contract for your business? Shop our business SIM only contract deals.
What is a SIM only deal?
A SIM only deal gives you a SIM card with a set allowance of data, minutes and texts, with no phone included. You can get a pay monthly SIM only deal (SIM only contract) or a pay as you go SIM. Our SIM only contracts come with unlimited minutes and texts, and you can choose the amount of data and contract length you want (12 or 24 months), compare our best SIM only deals today.
What does SIM only mean?
SIM only means a deal where you get a SIM card with a set allowance of data, minutes and texts, with no phone included. You can go for a pay monthly SIM (SIM only contract) or a pay as you go SIM.
How does SIM only work?
When you take out one of our SIM only contracts, we’ll send you your SIM via Royal Mail Tracked 24 post. You can then put your new SIM in your phone and start using your data, minutes and texts allowances.
When you order one of our free pay as you go SIMs, we’ll send this to you via Royal Mail 1st Class post. You can then put this in your phone and add a Rocket Pack of your choice, to get your data, minutes and texts for the month.
What happens when my SIM only contract ends?
When your SIM only contract ends, if you do nothing, your SIM only plan will continue on a rolling monthly basis, and you’ll be able to keep using your usual data, minutes and texts allowances. You can also choose to upgrade to a new plan or cancel your plan.
Can I keep my number on a SIM only deal?
You can keep your number when you take out a SIM only deal.
If you’re switching to us from another network, you’ll need to get a PAC code and give this to us when you join. For more info, please go to our ‘Switch to Tesco Mobile’ page.
If you’re already with us, please select ‘Existing customer’ when you take out your deal online, then follow the steps.
How can I check if I have a compatible 4G or 5G phone?
We’re making big changes to our network. Like the UK’s other mobile providers, we’ll be switching off our 3G service later this year. This will help us improve our 4G and 5G network, so more people across the UK can benefit from faster, more reliable connections.
You can use our handy 4G Calling tool to see if your phone is compatible. Simply follow the link, then enter the manufacturer and model of your device.
This tool will also give you exact instructions for how to turn on 4G Calling (also known as VoLTE). The process varies for different phones, but it’s easy and won’t take long.
What if I do not have a compatible 4G or 5G phone?
If you don’t have a compatible 4G or 5G phone, you will not be able to connect to our 4G or 5G networks. This means that after the 3G switch-off, you won’t be able to make and receive calls, send and receive texts, or use data without Wi-Fi. However, you will still be able to make emergency calls on the 2G network.
Need a new phone so that you’re ready for the switch-off? We have great deals on a wide range of compatible 4G and 5G handsets.
What if I change my mind?
You have a 14-day cooling off period to change your mind. See our Returns Policy for full details and exclusions.