Compare Sky Mobile SIMs: 10GB for £6, 50GB for £11
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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 July 2025.
Sky's best SIM only deals
The best overall Sky Mobile SIM only deal this month
just
£6
a month
✔ Unlimited mins and 10GB data See full deal
at sky.com
(opens in new window)
We think Sky Mobile's best value option on SIM only this July is their discounted £6 a month plan below, which comes with 10GB data, plus unlimited minutes and texts on a 12‑month deal:
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 10GB data or more. See the networks with cheaper plans here:
Sky's 50GB for £11 plan is a good option too
just
£11
a month
✔ Unlimited mins and 50GB data See full deal
at sky.com
(opens in new window)
If you need more data, the next best SIM only plan on Sky Mobile in our opinion is their discounted 12‑month one below. For £20 £11 a month, you get 50GB data, plus unlimited minutes and texts:
It’s a discount of £9 a month against the full price, adding up to a £108 saving over the 12 months.
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). Here's which other networks can beat it:
£25 Currys gift card (automatic, no need to claim)Their £20 for unlimited data plan is a decent deal for July
just
£20
a month
✔ Unlimited mins and unlimited data See full deal
at sky.com
(opens in new window)
For even more monthly data, another good deal on Sky Mobile at the moment is their discounted £29 £20 SIM only plan here, which includes unlimited data instead, plus unlimited minutes and texts:
That discount will save you £9 a month, which adds up to £108 over the course of the 12‑month deal.
It's actually possible to beat this deal if you're not fussed whether your SIM is with a provider using the O2 network. But if you are, it is the current best-priced option. See where you can get it for less here:
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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