Black Friday SIM only deals 2026

Black Friday 2026 is Friday 27 November, and Cyber Monday is 30 November. That's 31 days away. Networks and retailers usually start their offers a week or more before, so the cheapest deal can arrive before the day itself.

Three at £12.42 a month, 12 months, rising to £14.72 from April 2027. That is the cheapest unlimited data SIM with nothing to pay upfront on our panel on 27 October 2026.

Sometimes, but not every Black Friday offer is a lower price. Some are extra data, a discount for the first few months, or cashback you have to claim. Compare what you pay over the whole contract, including any price rise stated for April, and check whether a rolling plan suits you better than being tied in.

If you are out of contract, a SIM only deal can be switched in a day with a PAC code, so there is little to lose by checking now and again on the day. If you are still in contract, leaving early usually means paying what is left, which can cost more than a Black Friday saving.

Yes. Text PAC to 65075 and your network must send the code within a minute. Give it to your new network and your number usually moves within one working day.