Best SIM only on Tesco Mobile: 12GB for £9, 10GB for £10
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We've compared pricing on all of Tesco's pay monthly SIM only to find which ones stack up best against the rest of the market. Last updated: 15th June 2026.
Tesco best SIM only deals
The SIM only deal on Tesco Mobile we rate highest this month
just
£9
a month
✔ Unlimited mins and 12GB data See full deal
at tescomobile.com
(opens in new window)
We think Tesco Mobile's best value option on SIM only this June is their discounted £11 £9 a month plan below, which comes with 12GB data, plus unlimited minutes and texts on a 24‑month deal:
£20 Clubcard voucher (automatic, no need to claim)It’s a total discount of £48 over the 24 months, when you add up the deal’s monthly £2 saving.
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's where you can beat it on other networks:
Tesco's 30GB for £13 plan is a good option too
just
£13
a month
✔ Unlimited mins and 30GB data See full deal
at tescomobile.com
(opens in new window)
For those needing more data, we think this discounted 30GB is one of the best SIM only plans on Tesco Mobile too. It's on a 24‑month deal, comes with unlimited minutes and texts - all for £15 £13 a month:
Add up that monthly saving of £2 over the full 24 months and you’re looking at a total discount of £48.
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 lower-priced networks' deals here:
Their £20 for unlimited data plan is a decent deal for June
just
£20
a month
✔ Unlimited mins and unlimited data See full deal
at tescomobile.com
(opens in new window)
To get an even bigger data allowance, we also think this discounted £25 £20 Tesco Mobile SIM is one of their best options. It comes with unlimited data, unlimited minutes and texts on a 24‑month deal:
If you add up the £5 monthly discount, you’ll save £120 in total over the full 24 months on the deal.
It does enough to get into our pick of Tesco's best SIMs but that doesn't mean it's unbeatable on price. Other providers (even ones that use the O2 network) can beat it. 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