Black Friday SIM only deals 2025: first offers now live!

As with most years, a couple of mobile networks have already put live offers that they have badged with Black Friday. Currently, these are iD Mobile and Tesco Mobile. Take a look here.

For all the rest, we’re still waiting. In the meantime, we’ve put together our predictions per mobile network, as to what SIM only offers they will have over the Black Friday period.

We’ve been tracking Black Fridays on SIM only for the best part of ten years now. So we’ve got a good idea of what each mobile network will do, as well as how to spot the genuine deals from just black theming!

As more and more offers get live, we’ll update this guide with the latest deals daily. So do make sure to check back. It’s also worth just using our comparison tool here to compare all plans.

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

Having tracked Black Fridays over the past ten years, we can confidently say Three will have the best SIM deals of any major network. They’ve often made headlines in newspapers and comparison websites.

We predict they will have two types of offer. On their main website and in stores, we’ll likely see some kind of 6 months half price offer, on 24-month contracts. Perhaps an eye-opening unlimited data deal.

But it’s the exclusive deals they give to comparison websites you really want to look for. These will typically undercut, what’s on the main part of Three.co.uk – by a significant margin. See current exclusives here:

Our exclusive Three SIM only deals

We’d be amazed if we didn’t see the very popular 80GB for £8 deal come back Timings-wise, we’d expect things live a couple of weeks before the actual date. But maybe one last minute hero offer too.

At all previous Black Fridays, O2 have only stuck to having a couple of main SIM offers on their website and in-store. These were typically a discount on a massive data plan like 100GB or 200GB, or unlimited data.

That’s all very well if you’re in the market for those and have around £20 a month to spend. They never reduced their smaller, cheaper tariffs. O2 have stuck to big, high value deals.

But recently, O2 have been sharing some very competitive exclusive SIM deals with us, to pass onto our readers (see under the dropdown below). We could see these temporarily improved.

Our exclusive O2 SIM only deals

New O2 customers can benefit from any of these hidden deals:

O2 tend to play it short and sweet. They have previously put some mediocre Black Friday badged SIMs live at the beginning of November. But we’d wait until the actual date for their best deals, which will last only a couple of days.

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.

We don’t see 1pMobile change their offers that often. But last year, they did release a special 50GB for £10 SIM specifically for Black Friday. This deal has since come back and is still available.

1pMobile’s best current SIM offers

At the time, that was an improvement on the rest of the range. So we could see the same principle this year. Currently, we think 1pMobile are the best value way to get on the nearest thing to EE direct.

Other networks on EE can be cheaper but lack some of the full network features you get on 1p. So even if they do come in a little more expensive than the spusu and Lyca’s of the world, it could be worth investing in quality.

Either way, we don’t expect to see anything from 1p until right near the actual Black Friday date of 28th November. They simply don’t have the budget to throw huge discounts around for long.

As we say every year, giffgaff aren’t really ones for rapidly changing their offers. Their SIM only range changes maximum twice a year. They only ever really go hard on Black Friday for phone contracts.

They have surprised us once or twice before but we suspect their sole SIM only offer over Black Friday will be their current unlimited data for £15 deal (see dropdown below):

Current offers on giffgaff

So giffgaff are definitely one of the networks we only expect to see Black Friday branding for offers on, rather than genuine short term discounts or 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.

We’ve noticed a bit of a shift with SMARTY in the last few months. They’ve been focussed on offers across their entire range of SIM only plans, which only last a couple of weeks.

At previous Black Fridays, they’ve tended to have one or two headline-grabbing hero offers. Like 80GB for £8 or similar. We could see this. Or we could see a whole range of exclusives, like under the dropdown:

Best current SMARTY offers

Timings-wise, SMARTY are another network that tend to put one set of Black Friday themed offers live quite early in November. But then, they’ll usually bring out one extra, large data offer over the actual weekend.

For many years, Sky Mobile haven’t been that interested in competing for Black Friday deal hunters on SIM only. They’ve tended to focus just on their phone contracts over the period.

But recently, we’ve noticed a lot more activity from Sky in terms of SIM only offers. For the past few months, they have been trialling a range of exclusive SIM only plans for comparison sites like the ones below:

Our exclusive Sky Mobile SIM only offers

So our prediction is that we will see an extension of these for Black Friday. Sky don’t like to give away ridiculous value on their SIM only plans at the best of times, so don’t expect anything market leading.

But if they are your network of choice, the back end of November is certainly the time to think about making the switch, because it will be the best value of the year.

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.