Best SIM only on Tesco Mobile: 12GB for £9, Unlimited for £20
The retailers featured on this page may compensate us when our readers follow links to their websites and make a purchase. More
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: 17th April 2025.
Tesco best SIM only deals
Our favourite SIM only deal this month on Tesco Mobile
just
£20
a month
✔ Unlimited mins and unlimited data See full deal
at tescomobile.com
(opens in new window)
We think Tesco Mobile's best value option on SIM only this April is their discounted £25 £20 a month plan below, which comes with unlimited data, plus unlimited minutes and texts on a 24‑month deal:
Unlimited minutes + Unlimited texts + Unlimited data (5G) = £25 £20 a month (24‑month contract)
See full deal
That’s £120 you’ll save over 24 months with the deal thanks to the £5 monthly discount.
You can beat it for price if you don't need your SIM to be with a provider using the O2 network. But if that's a must, then it is the lowest-cost SIM with unlimited data. See lower-priced networks' deals here:
Unlimited minutes + Unlimited texts + Unlimited data (5G) = £18 £9 a month for 6 months, then £18 (24‑month contract)
See full deal
Unlimited minutes + Unlimited texts + Unlimited data (5G) = £20 £16 a month for 15 months, then £20 (1‑month plan, no contract)
See full deal
Unlimited minutes + Unlimited texts + Unlimited data (5G) = £16 a month (1‑month contract)
See full deal
Unlimited minutes + Unlimited texts + Unlimited data (5G) = £18 a month (1‑month contract)
See full deal
Unlimited minutes + Unlimited texts + Unlimited data (5G) = £26 a month (12‑month contract)
See full deal
🛈 Increased to: £27.80 on April 1 2026
Unlimited minutes + Unlimited texts + Unlimited data (5G) = £22 £20 a month (24‑month contract)
See full deal
Increased to: £23.00 on April 1 2027
Their £13 for 60GB plan is a decent deal for April
just
£13
a month
✔ Unlimited mins and 60GB data See full deal
at tescomobile.com
(opens in new window)
If you don't want so much data, Tesco Mobile are also offering this discounted £15 £13 SIM, which includes 60GB data, unlimited minutes and texts on a 24‑month plan. It's another of their best deals:
Unlimited minutes + Unlimited texts + 60GB data (5G) = £15 £13 a month (24‑month contract)
See full deal
That means a total saving of £48 when you add up the £2 discount over 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). Here are other networks you can beat it on:
Unlimited minutes + Unlimited texts + 50GB 60GB data (5G) = £7.95 a month (1‑month contract)
See full deal
Unlimited minutes + Unlimited texts + 40GB 60GB data (5G) = £10 £8 a month for 15 months, then £10 (1‑month plan, no contract)
See full deal
Unlimited minutes + Unlimited texts + 60GB data (5G) = £8 a month (1‑month contract)
See full deal
Unlimited minutes + Unlimited texts + 25GB 60GB data (5G) = £16 £8 a month (12‑month contract)
See full deal
Unlimited minutes + Unlimited texts + 120GB data (5G) = £12 a month (12‑month contract)
See full deal
Unlimited minutes + Unlimited texts + 60GB data (5G) = £17 £9.99 a month (12‑month contract)
See full deal
Unlimited minutes + Unlimited texts + 70GB 100GB data (5G) = £10 a month (24‑month contract)
See full deal
Unlimited minutes + Unlimited texts + 80GB data (5G) = £10 a month (1‑month plan, no contract)
See full deal
Unlimited minutes + Unlimited texts + 20GB 70GB data (5G) = £23 £10 a month (12‑month contract)
See full deal
They're also offering 12GB for £9 on SIM only currently
just
£9
a month
✔ Unlimited mins and 12GB data See full deal
at tescomobile.com
(opens in new window)
For people who don't need that much data, you might like the discounted £10 £9 SIM only deal running on Tesco Mobile at the moment. It's a 24‑month plan, which comes with 12GB data, unlimited minutes and texts too:
Unlimited minutes + Unlimited texts + 12GB data (5G) = £10 £9 a month (24‑month contract)
See full deal
In total, that discount of £1 a month means you’re looking at a saving of £24 over 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. See the networks with cheaper plans here:
Unlimited minutes + Unlimited texts + 25GB data (5G) = £14 £5.99 a month (12‑month contract)
See full deal
Unlimited minutes + Unlimited texts + 20GB data (5G) = £6 a month (1‑month contract)
See full deal
Unlimited minutes + Unlimited texts + 5GB 12GB data (5G) = £6 a month (1‑month plan, no contract)
See full deal
Unlimited minutes + Unlimited texts + 12GB data (5G) = £6 a month (24‑month contract)
See full deal
Unlimited minutes + Unlimited texts + 20GB data (5G) = £6.90 a month (1‑month plan, no contract)
See full deal
Unlimited minutes + Unlimited texts + 20GB 40GB data (5G) = £6.95 a month (1‑month contract)
See full deal
Unlimited minutes + Unlimited texts + 25GB 60GB data (5G) = £16 £8 a month (12‑month contract)
See full deal
Unlimited minutes + Unlimited texts + 50GB data (4G) = £8 a month (12‑month contract)
See full deal
🛈 Increased to: £9.00 on April 1 2026
Unlimited minutes + Unlimited texts + 20GB 32GB data (5G) = £23 £8 a month (12‑month contract)
See full deal
Compare all SIM only plans
Compare deals from all networks
How Tesco Mobile's deals compare with other networks
Networks
Providers:
Plan
Data: (0MB+)
Minutes: (0+)
Thanks, we'll send that out now. Please check your inbox for our email.More about Tesco's SIM only plans
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