Sky Mobile SIM only deals: Unlimited for £27, 50GB for £12
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We list the best of what's available on Sky's SIM only this month, after comparing each plan with other UK mobile networks. Last updated: 17th April 2025.
Sky's best SIM only deals
Our best-rated Sky Mobile SIM only deal this month
just
£27
a month
✔ Unlimited mins and unlimited data See full deal
at sky.com
(opens in new window)
Looking at what you can get on SIM only with Sky Mobile this April, our best-rated deal would be their 12‑month plan below, which comes with unlimited data, plus unlimited minutes and texts for £29 a month:
Unlimited minutes + Unlimited texts + Unlimited data (5G) = £29 £27 a month for 12 months, then £29 (12‑month contract)
See full deal
While this is a good enough deal to make it into the best of Sky's SIMs, you can beat it for price (even if you definitely want a provider that uses the O2 network). 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)
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Unlimited minutes + Unlimited texts + Unlimited data (5G) = £20 £16 a month for 15 months, then £20 (1‑month plan, no contract)
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Unlimited minutes + Unlimited texts + Unlimited data (5G) = £16 a month (1‑month contract)
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Unlimited minutes + Unlimited texts + Unlimited data (5G) = £18 a month (1‑month contract)
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Unlimited minutes + Unlimited texts + Unlimited data (5G) = £26 a month (12‑month contract)
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🛈 Increased to: £27.80 on April 1 2026
Unlimited minutes + Unlimited texts + Unlimited data (5G) = £22 £20 a month (24‑month contract)
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Increased to: £23.00 on April 1 2027
Unlimited minutes + Unlimited texts + Unlimited data (5G) = £25 £20 a month (24‑month contract)
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Unlimited minutes + Unlimited texts + Unlimited data (5G) = £11.50 a month for 6 months, then £23 (24‑month contract)
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🛈 ASDA reserve the right to increase the cost of this plan annually with one month's notice
Unlimited minutes + Unlimited texts + Unlimited data (5G) = £36 £24 a month (24‑month contract)
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🛈 Increased to: £25.50 on April 1 2026.
Increased to: £27.00 on April 1 2027
Unlimited minutes + Unlimited texts + Unlimited data (5G) = £25 a month (1‑month plan, no contract)
See full deal
Unlimited minutes + Unlimited texts + Unlimited data (5G) = £25 a month (1‑month plan, no contract)
See full deal
Unlimited minutes + Unlimited texts + Unlimited data (5G) = £12.50 a month for 1 month, then £25 (1‑month contract)
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🛈 Prices reduce over time!
Unlimited minutes + Unlimited texts + Unlimited data (5G) = £35 £25 a month (18‑month contract)
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Their £12 for 50GB plan is a decent deal for April
just
£12
a month
✔ Unlimited mins and 50GB data See full deal
at sky.com
(opens in new window)
If you need less data, you might like the £20 SIM only deal running on Sky Mobile at the moment. It's a 12‑month plan, which comes with 50GB data, unlimited minutes and texts too:
Unlimited minutes + Unlimited texts + 50GB data (5G) = £20 £12 a month for 12 months, then £20 (12‑month contract)
See full deal
It's a good enough deal to get into Sky'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 other networks you can beat it on:
Unlimited minutes + Unlimited texts + 50GB 60GB data (5G) = £7.95 a month (1‑month contract)
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Unlimited minutes + Unlimited texts + 40GB 60GB data (5G) = £10 £8 a month for 15 months, then £10 (1‑month plan, no contract)
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Unlimited minutes + Unlimited texts + 60GB data (5G) = £8 a month (1‑month contract)
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Unlimited minutes + Unlimited texts + 25GB 60GB data (5G) = £16 £8 a month (12‑month contract)
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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 + 50GB data (5G) = £8 a month (24‑month contract)
See full deal
Unlimited minutes + Unlimited texts + 20GB 50GB data (5G) = £23 £9.50 a month (12‑month contract)
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Unlimited minutes + Unlimited texts + 60GB data (5G) = £17 £9.99 a month (12‑month contract)
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Unlimited minutes + Unlimited texts + 80GB data (5G) = £10 a month (1‑month plan, no contract)
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Unlimited minutes + Unlimited texts + 50GB data (5G) = £11.90 a month (1‑month plan, no contract)
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Unlimited minutes + Unlimited texts + 27GB 50GB data (5G) = £12 a month (18‑month contract)
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They're also offering 3GB for £7 on SIM only currently
just
£7
a month
✔ Unlimited mins and 3GB data See full deal
at sky.com
(opens in new window)
For a smaller amount of data, we'd say this is one of Sky's best deals on SIM only this month too. It's a 12‑month plan, comes with 3GB data, unlimited minutes and texts for £8 a month:
Unlimited minutes + Unlimited texts + 3GB data (5G) = £8 £7 a month for 12 months, then £8 (12‑month contract)
See full deal
It might not be the lowest-cost SIM only deal with 3GB data or more on the entire market but if you're sure you need a SIM using the O2 network, it is the best-priced. See the networks with cheaper plans here:
Unlimited minutes + Unlimited texts + 3GB data (5G) = £2.50 a month for 6 months, then £5 (24‑month contract)
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Unlimited minutes + Unlimited texts + 5GB data (5G) = £4.50 a month (1‑month plan, no contract)
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Unlimited minutes + Unlimited texts + 5GB data (5G) = £5 £2.50 a month for 1 month, then £5 (1‑month contract)
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Unlimited minutes + Unlimited texts + 5GB data (5G) = £4.95 a month (1‑month contract)
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1000 minutes + 1000 texts + 5GB data (5G) = £5 a month (1‑month plan, no contract)
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Unlimited minutes + Unlimited texts + 4GB data (5G) = £5 a month (1‑month plan, no contract)
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Unlimited minutes + Unlimited texts + 3GB data (5G) = £5 a month (12‑month contract)
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Unlimited minutes + Unlimited texts + 20GB data (5G) = £6 a month (1‑month contract)
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Unlimited minutes + Unlimited texts + 5GB 12GB data (5G) = £6 a month (1‑month plan, no contract)
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Unlimited minutes + Unlimited texts + 11GB data (4G) = £7 a month (12‑month contract)
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🛈 Increased to: £8.00 on April 1 2026
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How Sky Mobile's deals compare with other networks
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How Sky Mobile’s SIM only prices and benefits stack up
In our Sky Mobile review we rated them highly for giving you full access to O2’s excellent network for call signal and 5G coverage, while offering lots of nice benefits on top (see our O2 vs Sky Mobile review here).
Their SIM plans are all on 12-month contracts and they don’t offer unlimited data plans, so they don’t offer as much choice as some networks. But there’s still a wide range of plans (find their best deals here).
Sky’s best value deals tend to be their mid-range data deals. They’re a cheaper way of getting onto the O2 network than going with O2 directly while also offering some great benefits that O2 don’t:
They offer an excellent unlimited free streaming data scheme on Sky TV apps and a great data rollover scheme that lets you keep data for 3 years. And you can gift data to other users on your account if need be.
Useful link: Read our full Sky Mobile review
What else you should know about Sky Mobile’s SIM only plans
You’ll get your SIM package within 1-3 working days of ordering. Your SIM package will come with each size of SIM to put into any phone. You can’t get an eSIM on Sky yet (these networks offer them).
Once your SIM card arrives, you have 14 days to cancel your SIM to get a full refund if you’re not happy with it. Here are the full details on how to do that.
To get on a Sky Mobile SIM only contract you’ll have to pass a credit check. There’s no way to pay as you go or buy a monthly bundle to avoid this.
If you want to switch from another network to Sky while keeping your number, you’ll have to request a PAC from your old network and send it to Sky. Here’s their full guide on how to do it.
Useful link: Compare all Sky SIMs