Right now, Mobiles.co.uk has an incredible SIM-only deal that gets you unlimited minutes and texts, and 100GB of data for £13.50 per month. It's easily one of the best SIM deals we're seeing right now over the Black Friday weekend and ahead of Cyber Monday.
The contract period is for one year, which amounts to a total payment of £162. Keep in mind, the SIM offers 4G connectivity, not 5G, though O2 launched its 5G services in October. You can pick up the same 100GB SIM directly from O2, where there's also an option to get the same amount of data on 5G, but both options cost you £25 monthly instead.
If you are looking for a 5G SIM plan though, there's also this equally incredible offer from Vodafone (also via Mobiles.co.uk) with unlimited data for £16.86 per month. Speeds are restricted to 10Mbps though.
Head to Mobiles to see its Black Friday SIM offers. For other SIM only deals, see our dedicated round up. We're also rounding up the best Black Friday and Cyber Monday deals separately, so be sure to check that out too.