Best SIMs on Tesco Mobile: 12GB for £9, 10GB for £10
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We compare the whole SIM only range on Tesco to find the ones that come out best in price comparisons with other networks. Last updated: 13th March 2026.
Tesco best SIM only deals
The best SIM only deal on Tesco Mobile this month
just
£9
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 March is their discounted 12GB for £10 £9 deal. It's on a 24‑month plan and comes with unlimited minutes and texts too:
£20 Clubcard voucher (automatic, no need to claim)If you add up the £1 monthly discount, you’ll save £24 in total over the full 24 months on the deal.
While it's good enough to be in our pick of Tesco's best SIM only deals, other providers do still have similar plans for less, even ones that also use the O2 network. See who's offering it for less here:
Their £13 for 30GB plan is a decent deal for March
just
£13
a month
✔ Unlimited mins and 30GB data See full deal
at tescomobile.com
(opens in new window)
To get a bigger chunk of data, you might like the discounted £15 £13 SIM only deal running on Tesco Mobile at the moment. It's a 24‑month plan, which comes with 30GB data, unlimited minutes and texts too:
That £2 monthly saving vs full price will save you £48 in total over the 24 months.
It's definitely one of Tesco's best. But it's not market-leading. You can get a similar plan on other providers for less, even if you need your SIM to use the O2 network. Here's where you can beat it on other networks:
They're also offering unlimited data for £20 on SIM only currently
just
£20
a month
✔ Unlimited mins and unlimited data See full deal
at tescomobile.com
(opens in new window)
If you need even more data, we'd say this is one of Tesco's best deals on SIM only this month too. It's a discounted 24‑month plan, comes with unlimited data, unlimited minutes and texts for £25 £20 a month:
It’s a discount of £5 a month against the full price, adding up to a £120 saving over the 24 months.
Even though it's in our pick of Tesco's best SIM only deals, you can actually beat it on price with other providers, including ones that also use the O2 network. See lower-priced networks' deals here:
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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