The 2026 Black Friday SIM sales have not started yet. Networks send us their Black Friday offers in early November, and this page is updated in real time as each one lands — bookmark it and check back. Black Friday itself is Friday 27 November 2026, with most SIM deals running from mid-November through Cyber Monday (30 November).
Why Black Friday is the best week for SIM only
SIM only is where networks compete most openly at Black Friday: no handset to subsidise, so the discounts go straight into bigger data allowances and lower monthly prices. Doubled data for the same money and unlimited plans at mid-tier prices are the classic patterns. Because most of the best offers are on 30-day rolling plans, there is little lock-in risk in grabbing one.
The networks to watch
Best for cheap unlimited data
Smarty and iD Mobile are usually the unlimited-data price leaders, and Black Friday typically pushes their unlimited plans to their lowest prices of the year.
Best for big-name networks
Vodafone, O2 and Three all run Black Friday SIM events — expect boosted data at mid-tier prices plus their usual perks (VeryMe, Priority, Three+).
Best for flexibility and no credit checks
giffgaff, VOXI and Smarty are contract-free year-round; at Black Friday they usually boost goodybag and plan data instead of cutting prices. VOXI's unlimited social media data makes its discounted plans especially strong value for heavy scrollers.
Best value on premium coverage
Keep an eye on Sky Mobile (data rollover Piggybank, O2 network), Spusu (EE network, no mid-contract rises) and Talkmobile and Lebara (both Vodafone network) — the MVNO route to big-network coverage at Black Friday prices.
How to pick the right plan
Check your current data usage before you shop — most people use far less than they pay for. Light users should not pay for unlimited; heavy users should compare the real unlimited prices on our unlimited data page rather than taking the first "deal" banner. If you want the freedom to leave, stick to 30-day plans; if you are happy to commit, 12-month terms are usually a pound or two cheaper per month. And switching is simple: text PAC to 65075, give the code to your new network, and your number follows you.
Black Friday SIM only FAQs
When do the Black Friday SIM deals start?
Mid-November, typically, with the strongest offers in Black Friday week itself. We list each deal here as networks release it.
Can I keep my number?
Yes — text PAC to 65075 from your current phone and pass the code to your new network. The switch usually completes in one working day.
Getting a new phone too?
Then start with our Black Friday phone deals guide — or pair a refurbished SIM free phone with any of the SIM deals above for the lowest total cost of all.
Compare every live offer any time on our SIM only comparison — and from early November, the Black Friday deals will be right here as they land.