Tesco Mobile's best SIM only offers: 30GB for £11, 100GB for £15
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We've checked through all the SIM only plans available on Tesco this month to find which stack up best against the competition. Last updated: 12th December 2025.
Tesco best SIM only deals
Our highest-rated SIM only deal on Tesco Mobile this month
just
£11
a month
✔ Unlimited mins and 30GB data See full deal
at tescomobile.com
(opens in new window)
Tesco Mobile's best SIM only plan this December in our opinion is their discounted £12.50 £11, 24‑month deal below, which comes with 30GB data, plus unlimited minutes and texts for your money:
It’s a total discount of £36 over the 24 months, when you add up the deal’s monthly £1.50 saving.
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 the networks that beat it here:
Tesco's 100GB for £15 plan is a good option too
just
£15
a month
✔ Unlimited mins and 100GB data See full deal
at tescomobile.com
(opens in new window)
For those needing 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 100GB data, unlimited minutes and texts for £17.50 £15 a month:
Add up that monthly saving of £2.50 over the full 24 months and you’re looking at a total discount of £60.
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 the networks where it'd cost less:
Their £25 for unlimited data plan is a decent deal for December
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, have a look at Tesco Mobile's discounted unlimited data SIM below at £25 a month, as it's another good deal. It's on a 24‑month plan and comes with unlimited data, unlimited minutes and texts:
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 which networks that are cheaper 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