Black Friday SIM only deals 2025: best offers on every network

As with lots of things, Black Friday is getting earlier every year. Almost half of the UK’s mobile networks have already published their SIM only offers for the period.

In this guide, we help you find the best genuine deals for what you need:

See our top rated deals here.

See each network’s best deals and our predictions here.

See deals for £10 or below here.

See unlimited data deals here.

Or simply compare all SIM only plans here.

We’ve been tracking Black Fridays on SIM only for the best part of ten years now, so below we use our experience to predict what each network will have and sort the genuine deals from the pretenders.

For out-and-out Black Friday cheapness, this Sky Mobile SIM’s hitting the right notes (ends 4th December). On the O2 network, it’d be a great SIM for anyone who’d normally pay as you go and just wants unlimited calls:

Unlimited minutes + Unlimited texts +  1GB data (5G) = £5 £2 a month (12‑month contract)
See full deal

🛈 No mid-contract price rise

In the mid-range of data, this spusu deal on the EE network offers historic value. It’s an exclusive too, you won’t find it advertised on the main part of their website:

Unlimited minutes + Unlimited texts +  20GB data (5G) = £7.90 £6.90 a month (1‑month plan, no contract)
See full deal

🛈 No price rises in 2026

While massive data users will love this exclusive Talkmobile deal on the full speed Vodafone 5G network:

Unlimited minutes + Unlimited texts + 50GB 100GB data (5G) = £9.95 a month (1‑month contract)
See full deal

🛈 No annual price rises

If you want to join one of the UK’s main networks (EE, O2, Three, Vodafone), it’s Three who are offering the best value ahead of Black Friday.

This exclusive deal which includes EU roaming is providing very popular and comes with almost four times the data the average user in the UK would get through:

Unlimited minutes + Unlimited texts +  40GB data (5G) = £8 a month (12‑month contract)
See full deal

🛈 Increased to: £9.25 on April 1 2026

More Three SIM only deals

For Vodafone, we’d be looking to join via Carphone Warehouse. They’ve got a range of exclusive low prices on Red plans (not the speed capped Basics tariffs), which pay you automatic cashback as a nice bonus:

Unlimited minutes + Unlimited texts +  30GB data (5G) = £10 a month (12‑month contract)
£18 auto cashback by cheque
See full deal

🛈 Increased to: £11.80 on April 1 2026

More Vodafone SIM only deals

Meanwhile O2 have sent us a range of exclusives to share with our readers. This is proving the most popular:

Unlimited minutes + Unlimited texts +  32GB data (5G) = £8 a month (12‑month contract)
See full deal

🛈 Increased to: £10.50 on April 1 2026

More O2 SIM only deals

EE don’t work with comparison websites anymore. See their website for details of their deals.

There’s no sign of Black Friday yet on 1pMobile. And we’re not expecting anything particularly new from them. They’ve only just changed their plans and they don’t change very ofte.

We actually think the limit of what you’ll see is some Black Friday branding added to their existing offers. That’s not necessarily a bad thing. We think this is superb value on EE’s full speed network:

Unlimited minutes + Unlimited texts + 25GB 50GB data (5G) = £10 a month (1‑month plan, no contract)
See full deal

🛈 No annual price rises

1pMobile’s best current SIM offers

If 1pMobile do do anything for Black Friday, we think it will be very last minute and only for a short period. They don’t have the budget to throw deep discounts at people for a long time.

There aren’t any on-site Black Friday deals on Three yet. When they do come, we would expect something like 6 months half price on 24-month contracts, or 3 months half price on 12-month deals.

Past experience tells us that Three will have a range of exclusives for comparison websites that beat their own headline Black Friday deals anyway. Like this 25GB plan that is incredibly popular at the moment:

Unlimited minutes + Unlimited texts +  25GB data (5G) = £16 £7 a month (12‑month contract)
See full deal

🛈 Increased to: £8.25 on April 1 2026

We’ve also got this exclusive for just £1 more that gives you more data and includes EU roaming too:

Unlimited minutes + Unlimited texts +  40GB data (5G) = £8 a month (12‑month contract)
See full deal

🛈 Increased to: £9.25 on April 1 2026

We’ve also go loads more exclusives under the dropdown here:

Our exclusive Three SIM only deals

There is now a range of Black Friday offers live on EE’s website. But so far they are only focused on phone contracts and other devices.

In the meantime, it’s worth looking at smaller providers that use EE’s network. You get a way better deal and still get to access leading coverage and superfast 5G and 4G:

Best offers on EE-based networks

We’d expect EE to launch a couple of large data deals (possibly unlimited data) in the run-up to Black Friday itself, rather than run a full months of deals.

We said it in our prediction: giffgaff don’t really dabble in SIM only offers for Black Friday. They just focus on their phone contracts. That said, they have got one key standout offer live until 4th December.

This deal gives you genuinely unlimited data (it’s not like their old ‘Always On’ plan) and was priced at £25 for many years. So the £10 discount adding up to £180 is real:

Unlimited minutes + Unlimited texts +  Unlimited data (5G) = £25 £15 a month (18‑month contract)
See full deal

🛈 No mid-contract price rises

giffgaff’s best current offers

No matter what pay monthly SIM only deal you take on iD Mobile between now and the 2nd December, you can enter yourself into their Black Friday Event competition to win a £2000 Currys gift card.

But their headline Black Friday offers on SIM only are 3 months half price on selected 12-month contracts. Or 6 months half price on selected 24-month ones. We think this is the best value of them all:

Unlimited minutes + Unlimited texts +  150GB data (5G) = £12 £6 a month for 3 months, then £12 (12‑month contract)
See full deal

🛈 No annual price rises

That said, in general the best value on iD is still to be had by taking one of our exclusive 1-month plans. These come with less commitment and you’ve got a full range of data amounts to pick from:

Our exclusive iD Mobile SIM only deals

We’re expecting something pretty competitive from Lyca Mobile over Black Friday. We’re likely to see them launch their offers around a week or so before the 28th and last a tiny bit longer too.

Their headline offers throughout the year have been things like 120GB for £10 on a 12-month deal. That’s put them well ahead of other EE-based networks. So we could see something beating that.

The best Lyca Mobile offers now

They’re also fond of 6 months half price offers on 24-month contracts. Our main problem is they’ve tended to make the full price part of your contract overly expensive (for them).

So a time-limited discount against a regularly priced deal could be a strong seller for Lyca Mobile. Either way, they will definitely be ones to watch this November.

On the main part of O2’s website, their hero Black Friday offer is a very tidy unlimited data for £20 deal, which has genuinely been in the mid-£20 range for the last years. This ends 10th December:

Unlimited minutes + Unlimited texts +  Unlimited data (5G) = £24 £20 a month (24‑month contract)
See full deal

🛈 Increased to: £26.50 on April 1 2026.
Increased to: £29.00 on April 1 2027

But we’ve been given a set of exclusive O2 SIMs to share with our customers for Black Friday. These are full speed, regular 12-month contracts, including EU roaming. You’ll need to be a new O2 customer to join.

The most popular will be this deal, with over 4x the amount of data the average person in the UK would ever need to use, for just £8.50 a month (new customers only):

Unlimited minutes + Unlimited texts +  50GB data (5G) = £8.50 a month (12‑month contract)
See full deal

🛈 Increased to: £11.00 on April 1 2026

There are plenty more to choose from under this dropdown too:

Our exclusive O2 SIM only deals

We are also expecting a second phase of O2 deals to come along, closer to Black Friday. These don’t always get better in our experience. It could be worth waiting, it could be a gamble too far!

Despite launching some new SIM offers badged up as Black Friday, we actually think Sky’s existing exclusive offers are still the best value. Particularly this 10GB deal for just £6 a month:

Unlimited minutes + Unlimited texts + 3GB 10GB data (5G) = £10 £6 a month (12‑month contract)
See full deal

🛈 Data plan price may increase during new minimum term

Only cheapy cheap networks are beating that at the moment. It’s available until 17th December. Sky’s other exclusive 50GB for £11 offer is also good value for an O2-based network:

Unlimited minutes + Unlimited texts +  50GB data (5G) = £20 £11 a month (12‑month contract)
See full deal

🛈 Data plan price may increase during new minimum term

Our past experience tells us that Sky could launch a last minute flash offer, much closer to the Black Friday date. Possibly on their unlimited data plan or one of their bigger data deals.

But if you’re after a smaller amount, you should be safe to order already, without waiting.

We now have the first of SMARTY’s Black Friday branded offers available until 8th December:

Unlimited minutes + Unlimited texts + 16GB 50GB data (5G) = £8 a month (1‑month plan, no contract)
See full deal

🛈 No annual price rises

But we are expecting more. The bulk of SMARTY’s other offers are due to end on 16th November. We are then expecting more Black Friday SIMs to be launched the following day, or potentially a few days later.

They also usually hold back one big data offer for very close to actual Black Friday too. Expect something eye catching in the 100GB+ or unlimited data range. In the meantime, this is a very good value deal available now:

We don’t have any inside information on whether their deals will be an improvement on today’s exclusive plans we have. See under the dropdown:

Best current SMARTY offers

We think you’re already safe to order from spusu. Their main website offers are set to end on 13th November. But spusu have indicated to us they won’t be offering anything out of the ordinary for Black Friday.

There’s pretty much a market-leading plan for every data usage amount on spusu, check under dropdown here for the full list.

Best current offers on spusu

If you’re stuck for which to take, the 20GB deal below is proving our most popular. It gives you twice what the average UK user gets through at a market leading price on the EE network:

Unlimited minutes + Unlimited texts +  20GB data (5G) = £7.90 £6.90 a month (1‑month plan, no contract)
See full deal

🛈 No price rises in 2026

In some ways, Talkmobile have a problem over Black Friday. Their deals are almost always in and around the best value on the market. So they don’t have a huge amount to play with for extra discounts.

At previous Black Fridays, Talkmobile have tended to have one or two hero offers on their main website, particularly on larger data amounts.

But then they’ve kept going with a range of exclusive SIM plans for comparison websites, which undercut their main deals. In previous years, these weren’t improvements but were already market leading.

Best current SIM offers on Talkmobile

Either way, Talkmobile will definitely be a top destination for cheap plans for any data requirement over the period. They always are. Just don’t be disheartened their offers are nothing new.

Tesco are another network, who normally publish their Black Friday offers early. This year they did it in October! They’ve got a couple of cut-price offers for Clubcard holders:

Unlimited minutes + Unlimited texts +  12GB data (5G) = £10 £9 a month (24‑month contract)
See full deal

🛈 No annual price rise for Clubcard holders

Unlimited minutes + Unlimited texts +  60GB data (5G) = £15 £12 a month (24‑month contract)
See full deal

🛈 No annual price rise for Clubcard holders

You never really find Tesco competing massively on SIM only, so these are both beatable. From monitoring them over previous years though, we do expect to see at least one more strong offer.

We’d be willing to bet that will be unlimited data for £18 on a 24-month contract. This deal briefly appeared in lists that mobile networks sent us, but wasn’t on their website. So could be a sign of what’s to come.

But don’t expect that to come along until the last minute, potentially actually on Black Friday itself.

There are two ways you can join Vodafone. One is direct via their website. The other is via resellers like Carphone Warehouse and Mobiles.co.uk. They’re not comparison websites, you buy Vodafone from them.

Over Black Friday, Vodafone themselves tend to only stick to a couple of very short offers: starting on the day itself and lasting to Cyber Monday. Think unlimited data for £20. Or 200GB for £18.

Where the real value lies is by signing up to Vodafone via Carphone or Mobiles.co.uk. Not only do they have better value plans in the first place, you’ll also get automatic cashback offers too.

Best Vodafone SIM only offers now

The amounts tend to ramp up over Black Friday, so will definitely be worth checking in on. You get signed up to the full Vodafone experience at a fraction of the cost. It’s a good system.

If previous years are anything to go by, we expect VOXI to have a range of decent-enough exclusive deals available throughout November for comparison websites like us (see current deals below).

VOXI’s current SIM only deals

But then for Black Friday itself and over the weekend into Cyber Monday, VOXI will usually release one big headline offer that’s available on the main part of their website.

This will typically be a big data deal, probably something like 100GB for £10. That would be genuine record value from VOXI all year, so it’s worth pouncing on. But you won’t have long.

For all the talk on the internet of VOXI being a low-cost network, it’s only really relative to Vodafone that they’re cheaper. Vs other comparison website led providers, they’re nowhere near on price alone.

This iD Mobile exclusive deal using the Three network has been around a while. But their on-site Black Friday deals still can’t beat its value and flexibility, on just a 1-month contract with EU roaming:

Unlimited minutes + Unlimited texts + 60GB 108GB data (5G) = £10 £9 a month (1‑month contract)
See full deal

🛈 No annual price rises

This is an absolutely massive exclusive offer from Talkmobile on the Vodafone network. They’ve not launched any Black Friday specific deals yet. And we’re not sure they’ll be giving away more value than this:

Unlimited minutes + Unlimited texts + 50GB 100GB data (5G) = £9.95 a month (1‑month contract)
See full deal

🛈 No annual price rises

If you’re not already an O2 customer, you can benefit from this new-customer exclusive they’ve sent us too. You’re getting main network benefits, with EU roaming, for virtual operator prices:

Unlimited minutes + Unlimited texts +  80GB data (5G) = £10 a month (12‑month contract)
See full deal

🛈 Increased to: £12.50 on April 1 2026

Or to get on the EE network, the most amount of data for a tenner is with Lyca Mobile. You can get up and running nearly instantly, if you choose an eSIM with this contract deal:

Unlimited minutes + Unlimited texts +  70GB data (5G) = £10 a month (24‑month contract)
See full deal

🛈 No annual price rises

For just an outrageous low price, we really like Sky’s deal here on the O2 network. That £2 won’t go up during the course of your contract either, so it’s good for 12 months:

Unlimited minutes + Unlimited texts +  1GB data (5G) = £5 £2 a month (12‑month contract)
See full deal

🛈 No mid-contract price rise

This exclusive Three offer hasn’t been published specifically for Black Friday. But where else are you going to get this much data on a main UK mobile network? It’s double what the average UK user needs:

Unlimited minutes + Unlimited texts +  25GB data (5G) = £16 £7 a month (12‑month contract)
See full deal

🛈 Increased to: £8.25 on April 1 2026

We also think it’s hard to fault this exclusive plan on spusu, which uses the full speed EE network:

Unlimited minutes + Unlimited texts +  20GB data (5G) = £7.90 £6.90 a month (1‑month plan, no contract)
See full deal

🛈 No price rises in 2026

This is another brilliant low price main network offer on O2. It gives you full speeds, EU roaming and all normal O2 features. You will need to be a new customer to O2 though:

Unlimited minutes + Unlimited texts +  12GB data (5G) = £6.99 a month (12‑month contract)
See full deal

🛈 Increased to: £9.49 on April 1 2026

Meanwhile for a low cost deal on the full Vodafone network, it’s Talkmobile that win out at the moment:

Unlimited minutes + Unlimited texts + 15GB 25GB data (5G) = £6.95 a month (1‑month contract)
See full deal

🛈 No annual price rises

We expect a reasonable amount of competition during the Black Friday period for unlimited data. Although there are already some excellent deals out there already, if you can’t be bothered waiting.

For out-and-out main network value, there’s this on the UK’s fastest 5G network from Three:

Unlimited minutes + Unlimited texts +  Unlimited data (5G) = £28 £18 a month (12‑month contract)
See full deal

🛈 Increased to: £19.50 on April 1 2026

To get on the EE network, low-cost providers Lyca Mobile have a 6 months half price offer here on an already very well priced unlimited data SIM:

Unlimited minutes + Unlimited texts +  Unlimited data (5G) = £18 £9 a month for 6 months, then £18 (24‑month contract)
See full deal

🛈 No annual price rises

On the O2 network giffgaff have got this flat-priced £15 unlimited data SIM on sale until 4th December (it’s not one of their Always On plans either, which had capped speeds):

Unlimited minutes + Unlimited texts +  Unlimited data (5G) = £25 £15 a month (18‑month contract)
See full deal

🛈 No mid-contract price rises

And last but not least on the Vodafone network, their sub-brand Talkmobile have this ultra cheap unlimited everything SIM with no long-term commitments:

Unlimited minutes + Unlimited texts +  Unlimited data (5G) = £16.95 a month (1‑month contract)
See full deal

🛈 No annual price rises

Each network’s best unlimited data deal