Sky Mobile SIM only deals: 10GB for £6, 40GB for £10
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Compare pricing on Sky's SIM only this month vs all the other UK mobile networks. We've identified their best options. Last updated: 21st November 2025.
Sky's best SIM only deals
The best overall SIM only deal this month on Sky Mobile
just
£6
a month
✔ Unlimited mins and 10GB data See full deal
at sky.com
(opens in new window)
Out of the best SIM only plans on Sky Mobile this November, we think the leading deal is their discounted 12‑month 10GB for £6 one below, which also comes with unlimited minutes and texts:
It isn't actually the cheapest 10GB data or more SIM available overall this month but if you definitely need your plan to use the O2 network, it is the lowest cost option. See the networks with cheaper plans here:
Their 40GB for £10 SIM is another good option
just
£10
a month
✔ Unlimited mins and 40GB data See full deal
at sky.com
(opens in new window)
For those needing more data, another option for you on Sky is their discounted 12‑month SIM below, which costs £10 a month for 40GB data and comes with unlimited minutes and texts:
It might be one of Sky's best deals on SIM only but you can get a lower price for a similar plan on other providers, even ones that use the O2 network. Here's which other networks can beat it:
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)
To get an even bigger data allowance, Sky have got a discounted £11 deal on SIM only we think's worth looking at. It gets you 50GB data, unlimited minutes and texts and it's a 12‑month plan:
This is good for Sky but it's not an unbeatable price. You can get similar SIM only plans for less with some other providers, even ones that also use the O2 network. See where you can get it for less here:
Their £20 for unlimited data plan is a decent deal for November
just
£20
a month
✔ Unlimited mins and unlimited data See full deal
at sky.com
(opens in new window)
To get an even bigger chunk of data, we think this discounted unlimited data is one of the best SIM only plans on Sky Mobile too. It's on a 12‑month deal, comes with unlimited minutes and texts - all for £20 a month:
It's a good deal by Sky's standards but price-wise you can still beat this plan on other providers (even ones that still use the O2 network). Here are the networks offering it cheaper:
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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