Best SIM only on Tesco Mobile: 12GB for £9, 60GB for £12
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Find out which of Tesco's plans came out top when we compared their pricing on SIM only with the other UK mobile networks. Last updated: 28th November 2025.
Tesco best SIM only deals
This month's best SIM only deal on Tesco Mobile
just
£9
a month
✔ Unlimited mins and 12GB data See full deal
at tescomobile.com
(opens in new window)
Out of all Tesco Mobile's SIM only plans they've got running this November, our current best pick would be their discounted £10 £9 one below. It's on a 24‑month deal, gets you 12GB data, plus unlimited minutes and texts as well:
It’s a total discount of £24 over the 24 months, when you add up the deal’s monthly £1 saving.
It's a good deal by Tesco's standards but price-wise you can still beat this plan on other providers (even ones that still use the O2 network). Here's which other networks can beat it:
Or their £12 for 60GB SIM plan is worth a look too
just
£12
a month
✔ Unlimited mins and 60GB data See full deal
at tescomobile.com
(opens in new window)
For those needing more data, our next best pick of Tesco Mobile SIM only plans is their discounted 24‑month £15 £12 deal below, which gets you 60GB data and unlimited minutes and texts:
Add up that monthly saving of £3 over the full 24 months and you’re looking at a total discount of £72.
If you're open to joining other networks than Tesco, you can actually get a similar deal for less, even with providers whose SIMs also use the O2 network. See where you can get it for less here:
Tesco are also offering unlimited data for £25 on SIM only
just
£25
a month
✔ Unlimited mins and unlimited data See full deal
at tescomobile.com
(opens in new window)
To get an even bigger data allowance, Tesco Mobile are also offering this discounted £25 SIM, which includes unlimited data, unlimited minutes and texts on a 24‑month plan. It's another of their best deals:
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. Here are the networks offering it cheaper:
They've also got a unlimited data for £18 SIM plan at the moment
just
£18
a month
✔ Unlimited mins and unlimited data See full deal
at tescomobile.com
(opens in new window)
If you don't need that much data, you might like the discounted £18 SIM only deal running on Tesco Mobile at the moment. It's a 24‑month plan, which comes with unlimited data, unlimited minutes and texts too:
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. See the networks that beat it 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