Best SIMs on Tesco Mobile: 12GB for £9, 10GB for £10
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See how we rate each of the choices on Tesco's SIM only, compared with other UK mobile networks' closest plans. Last updated: 26th February 2026.
Tesco best SIM only deals
Our best-rated Tesco Mobile SIM only deal this month
just
£9
a month
✔ Unlimited mins and 12GB data See full deal
at tescomobile.com
(opens in new window)
Looking at what you can get on SIM only with Tesco Mobile this February, our best-rated deal would be their discounted 24‑month plan below, which comes with 12GB data, plus unlimited minutes and texts for £10 £9 a month:
£20 Clubcard voucher (automatic, no need to claim)It’s a discount of £1 a month against the full price, adding up to a £24 saving over the 24 months.
It's currently the best priced 12GB data or more SIM only deal on a provider using the O2 network, even if you can beat it on price if you're open to ones not on O2. See lower-priced networks' deals here:
Their £13 for 30GB plan is a decent deal for February
just
£13
a month
✔ Unlimited mins and 30GB data See full deal
at tescomobile.com
(opens in new window)
For more monthly 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 discount will save you £2 a month, which adds up to £48 over the course of the 24‑month deal.
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. Here are other networks you can beat it on:
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)
To get 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:
That’s £120 you’ll save over 24 months with the deal thanks to the £5 monthly discount.
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. See the networks with cheaper plans 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