Tesco Mobile's best SIMs: 12GB for £9.50, 10GB for £10
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Compare pricing on Tesco's SIM only this month vs all the other UK mobile networks. We've identified their best options. Last updated: 13th January 2026.
Tesco best SIM only deals
This month's best SIM only deal on Tesco Mobile
just
£9.50
a month
✔ Unlimited mins and 12GB data See full deal
at tescomobile.com
(opens in new window)
We think the best value for money SIM only plan on Tesco Mobile for January is their discounted 12GB for £11 £9.50 deal. It's on a 24‑month plan and comes with unlimited minutes and texts too:
If you add up the £1.50 monthly discount, you’ll save £36 in total over the full 24 months on the deal.
While this is a good enough deal to make it into the best of Tesco's SIMs, you can beat it for price (even if you definitely want a provider that uses the O2 network). Here's where you can beat it on other networks:
£14 for 60GB is Tesco's next best SIM deal in January
just
£14
a month
✔ Unlimited mins and 60GB data See full deal
at tescomobile.com
(opens in new window)
To get a bigger chunk of data, our next best pick of Tesco Mobile SIM only plans is their discounted 24‑month £17.50 £14 deal below, which gets you 60GB data and unlimited minutes and texts:
That £3.50 monthly saving vs full price will save you £84 in total over the 24 months.
It's a good enough deal to get into Tesco's best SIMs but you can actually get a lower price for a similar plan elsewhere, even if you definitely want it to use the O2 network. See lower-priced networks' deals here:
There's also a nice unlimited data for £24 plan with them this month
just
£24
a month
✔ Unlimited mins and unlimited data See full deal
at tescomobile.com
(opens in new window)
If you need even more data, Tesco Mobile are also offering this discounted £30 £24 SIM, which includes unlimited data, unlimited minutes and texts on a 24‑month plan. It's another of their best deals:
£40 Clubcard voucher (you must claim this reward)It’s a discount of £6 a month against the full price, adding up to a £144 saving over the 24 months.
In comparison to the rest of Tesco's current SIM only plans, it's one of the best. But it is beatable on price, even if you're set on joining a provider that uses the O2 network. Here are other networks you can beat it on:
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How Tesco Mobile’s benefits and SIM only prices compare
In our review of Tesco Mobile we said we liked the fact that you get access to O2’s great mix of coverage, as well as O2’s fast 5G network. They offer the same coverage experience as being on O2 directly.
You can take a 1-month, 12-month or 24-month contract. Usually, the longer the contract the less you’ll pay each month, but it’s worth comparing plans here to check for any special deals on different plans.
Tesco tend to offer good value on mid-range data plans. And if you’ve got a Clubcard you can get better value deals than their regular range, but only on certain tariffs. They typically offer better value than O2.
One massive benefit is that you can collect Clubcard points from shopping at Tesco stores to get money off your monthly bill and vice versa. And you get extra benefits for adding other users onto your account.
Useful link: Read our full Tesco Mobile review
Handy information about Tesco’s SIM only plans
Your Tesco Mobile SIM will be delivered within 1-5 working days (depends where you live and when you ordered). Or you can take one from a Tesco store. You’ll get every size of SIM, but you can’t get an eSIM.
You’ll have 14 days after your SIM arrives to return it if you’re not satisfied. You’ll get a full refund, even if you’ve used some of your data. Here’s how you can do it.
To join any Tesco SIM only contract you’ll have to pass a credit check. If you’ve got a bad or no credit history you can still join them by taking out a “Rocket Pack” which are bundles of mins, texts and data.
To keep your number when switching to Tesco Mobile from another network, you can request a PAC from you current provider and send it to Tesco whenever.
Useful link: Compare all Tesco SIMs