Best SIM only deals for Black Friday & Cyber Monday

Got a phone you love, and just need a SIM to put in it? There are plenty to choose from on Black Friday & Cyber Monday weekend.

Here's our pick of the very best offers on all the major networks, all of which are chosen principally because we think they're really good value for money.

But that's not our only criterion. We'll also highlight deals that include attractive sweeteners, such as free Apple Music or a really comprehensive international roaming scheme.

Our best Three Black Friday SIM deals

Why choose Three: Three's major selling points are good prices and generous allowances. No restrictions on tethering your phone too.

For Black Friday, one of its top SIM deals include a 12-month SIM plan that gives you a whopping 120GB of data for £12 a month.

Our best O2 Black Friday SIM deals

Why choose O2: Excellent benefits and good speeds and coverage. But it's the freebies that you get with the O2 Priority rewards scheme that really seal the deal.

Right now, one of O2's top deals is its 30GB for £8 a month plan, available on a 12-month contract. 

Our best SMARTY Black Friday SIM deals

Why choose SMARTY: SMARTY SIMs are excellent value and come with free EU roaming. And because they're 30-day rolling contracts, you've got the option to cancel at any time with 30 days' notice.

For Black Friday, SMARTY is offering a whopping 80GB for £10 a month (on a flexible one-month plan).

Our best Lycamobile Black Friday SIM deals

Why choose Lycamobile: One of the cheapest mobile networks around, Lycamobile's plans crucially come with inclusive international minutes and cheap dialling rates.

For Black Friday, Lycamobile is offering a one-month contract that gives you 15GB for a mere £1.99 per month for the first six months (rising to £8.50 per month afterwards).

Our best giffgaff Black Friday SIM deals

Why choose giffgaff: giffgaff's plans are budget-friendly and flexible. You have plenty of choice when it comes to data allowances and contract lengths, whether you prefer pay-as-you-go, monthly rolling deals or 18-month contracts.

For Black Friday this year, giffgaff is offering 500GB for £20, on an 18-month contract. Not to mention, customers also get an £80 gift card and increased data for the first six months.

When is Black Friday and Cyber Monday in 2023?

The dates for your diary for Black Friday and Cyber Monday this year are November 24th and November 27th respectively. 

But networks typically launch their cheap Black Friday SIM deals weeks ahead of the big day. So you can start shopping for a bargain much earlier.