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Sky Mobile SIM only deals: Unlimited for £27, 50GB for £12

Sky logo with a SIM cardVisit sky.com

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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

Sky Mobile SIM only deal
SIM only
just
£27
a month
🛈 Data plan price may increase during your new minimum term

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:

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:

ASDA Mobile logo

Unlimited minutes + Unlimited texts + 0MB Unlimited data (5G) = £0 £11.50 a month for 6 months, then £23 (24‑month contract)
See full deal

150 Mbps speed cap
🛈 ASDA reserve the right to increase the cost of this plan annually with one month's notice
EE logo

Unlimited minutes + Unlimited texts + 0MB Unlimited data (5G) = £36 £24 a month (24‑month contract)
See full deal

Speed capped to 100 Mbps
🛈 Increased to: £25.50 on April 1 2026.
Increased to: £27.00 on April 1 2027

Their £12 for 50GB plan is a decent deal for April

Sky Mobile SIM only deal
SIM only
just
£12
a month
🛈 Data plan price may increase during your new minimum term

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:

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:

ASDA Mobile logo

Unlimited minutes + Unlimited texts + 0MB 60GB data (5G) = £17 £9.99 a month (12‑month contract)
See full deal

🛈 ASDA reserve the right to increase the cost of this plan annually with one month's notice
VOXI logo

Unlimited minutes + Unlimited texts + 0MB 80GB data (5G) = £0 £10 a month (1‑month plan, no contract)
See full deal

🛈 VOXI reserve the right to increase the cost of this plan annually with one month's notice

They're also offering 3GB for £7 on SIM only currently

Sky Mobile SIM only deal
SIM only
just
£7
a month
🛈 Data plan price may increase during your new minimum term

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:

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:

Talk Home logo

Unlimited minutes + Unlimited texts + 0MB 4GB data (5G) = £0 £5 a month (1‑month plan, no contract)
See full deal

🛈 Talkhome reserve the right to increase the cost of this plan annually with one month's notice

Compare all SIM only plans

Compare deals from all networks

How Sky Mobile's deals compare with other networks

SIM card with magnifying glass

Networks

Providers:

1p Mobile logo
Three logo
ASDA logo
Coop Mobile logo
EE logo
giffgaff logo
Honest logo
ID logo
Lebara logo
Lycamobile logo
O2 logo
SMARTY logo
Sky logo
spusu logo
Talkhome logo
Talkmobile logo
Tesco logo
Vodafone logo
VOXI logo

Plan

Data: (0MB+)

Minutes: (0+)

Contract

Maximum length: (Any)

Added features

How Sky Mobile compare

How Sky Mobile’s SIM only prices and benefits stack up

Sky logo with rating stars

We go into more detail in our reviewRead our full review

at simsherpa.com
(opens in new window)

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

Sky Mobile's network map

Check their coverage map in your areaCheck local coverage

at sky.com
(opens in new window)

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

Other Sky Mobile guides