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: 5th June 2026.
Tesco best SIM only deals
Our favourite SIM only deal this month on Tesco Mobile
just
£9
a month
✔ Unlimited mins and 12GB data See full deal
at tescomobile.com
(opens in new window)
From all the options Tesco Mobile have got available this June on SIM only, we think this discounted £11 £9 24‑month deal is their best. For your £9 a month, you get 12GB data alongside unlimited minutes and texts:
£20 Clubcard voucher (automatic, no need to claim)With £2 off per month, the total saving over the deal’s 24 months adds up to £48.
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. Here's where else you can get a lower price:
We also like their £13 for 30GB plan
just
£13
a month
✔ Unlimited mins and 30GB data See full deal
at tescomobile.com
(opens in new window)
To satisfy bigger data needs, another option for you on Tesco is their discounted 24‑month SIM below, which costs £15 £13 a month for 30GB data and comes with unlimited minutes and texts:
You’ll save £48 in total when you add up that £2 monthly saving over the deal’s 24 months.
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). See who's offering it for less here:
Their unlimited data for £20 SIM is another good option
just
£20
a month
✔ Unlimited mins and unlimited data See full deal
at tescomobile.com
(opens in new window)
If you think you'll need even more data, Tesco have got a discounted £25 £20 deal on SIM only we think's worth looking at. It gets you unlimited data, unlimited minutes and texts and it's a 24‑month plan:
It’s a total discount of £120 over the 24 months, when you add up the deal’s monthly £5 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:
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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