Three UK Christmas sale 2025: best deals on phones & SIMs

Christmas is a big time for mobile networks, with people buying phones as presents. Or needing a SIM only plan to put in a handset bought as a gift. So Three have got plenty of offers to get your custom.

In a hurry? Here are the best SIM deals

Typically, the last day for delivery in time for Christmas is around 18th December. So you’ll need to be reasonably quick to make sure you avoid disappointment come the big day.

In this guide, we pick out the best of Three’s Xmas deals on both phone contracts and SIM only plans, to help you make your budget go further over the festive period!

Three’s main Christmas deal on SIM only gives you a saving of £216 vs its previous price over the course of your contract. With unlimited data, it’d be a great SIM for data-guzzling teenagers and gamers:

Unlimited minutes + Unlimited texts +  Unlimited data (5G) = £33 £24 a month (24‑month contract)
See full deal

🛈 Increased to: £29.30 on April 1 2026.
Increased to: £31.60 on April 1 2027

It’s packed with extra value too. You get EU roaming included. And a 12-month free subscription to Paramount+, the streaming service. That’ll give you quality films to watch over the holidays and beyond.

If you’re not fussed about EU roaming or Paramount+, we’ve got an even cheaper £18 unlimited data exclusive deal here that strips those out. It’s on a shorter 12-month contract too:

Unlimited minutes + Unlimited texts +  Unlimited data (5G) = £28 £18 a month (12‑month contract)
See full deal

🛈 Increased to: £20.30 on April 1 2026

Or if you don’t need unlimited data, see more offers below.

There also some smaller savings on Three’s 250GB and 40GB plans live on Three’s website. But they’ve actually provided us with some much better deals on shorter contracts.

This 30GB plan with EU roaming and 6 months of Paramount+ streaming free is our most popular deal at the moment:

Unlimited minutes + Unlimited texts +  30GB data (5G) = £8 a month (12‑month contract)
See full deal

🛈 Increased to: £9.90 on April 1 2026

Or check under the dropdown here, because we’ve got an exclusive to match everyone’s monthly needs:

See all exclusive Three SIM deals

If you want to get someone a new iPhone for Christmas, Three’s best offer in their sale is a saving of up to £252 on iPhone 15.

To get that saving, choose the 250GB plan. This has been reduced by £7 a month, which totals £252 over the course of 36 months (the length of the finance agreement. Other plans have smaller discounts.

If you want the bang up to date latest iPhone, Three have knocked £5 off the 250GB plan with iPhone 17. That quickly adds up over a 36-month finance agreement as a very handy £180.

There are some other discounts too on the airtime part of your contract with other iPhone models, including 6 months half price. Have a look at Three’s full range of iPhone here.

If you want to give the gift of a nice new Android phone, Three have got loads of good options for you in their Christmas sale.

The most eye-opening is on the latest Samsung Galaxy model. Save up to £545 on the Galaxy S25 FE. The discount’s made up of two parts: a £360 saving over 36 months on the unlimited or 250GB plan, plus £185 off the cost of the phone too.

Or there’s a very handsome £360 off the airtime with the Google Pixel 10 Pro XL. You’ll need to pick the unlimited data plan with that one to get the discount – ideal if you’re handing it over to a data hungry teen.

There are plenty of other offers running across other Android models too (see their full range here). If you’re stuck which to go for, use our phone deal finder below, which has all their latest offers on all devices.