Three Discount Codes
Active Coupons for Three
Some offers require you to click through to reveal a code, or apply automatically at checkout on the retailer's own site.
50% off for 6 Months plus Claim £200 When You Switch at Three
50% Off
£50 Amazon Gift Card with 5G Home Broadband 24 Month New Customer Contracts at Three
Big Deal
Up to 20% Student Discount at Three
20% Off
About Three Promo Codes & Cashback
Three Mobile is a major UK network known for strong 5G coverage and flexible plans covering everything from light data users to heavy streamers. Perks like Go Roam let you use your allowance in over 70 destinations at no extra cost, while the Wuntu rewards app throws in regular deals and freebies for existing customers.
Whether you’re upgrading to a new handset or switching networks for a better monthly rate, a discount code can take a chunk off the upfront or ongoing cost. It’s worth comparing plans and codes side by side before you commit.
How to Save at Three
- Compare SIM-only plans against contract deals, as SIM-only is usually cheaper if you already own your handset.
- Make the most of Go Roam when travelling, avoiding extra roaming charges across more than 70 destinations.
- Check the Wuntu app regularly for exclusive deals and discounts available only to existing Three customers.
If you’re due an upgrade, it’s worth checking new handset deals against simply switching your existing SIM plan, since the better value option depends on how new a phone you actually need. Applying a discount code alongside a SIM-only deal tends to offer the most predictable monthly saving.
Three FAQs
How many destinations does Go Roam cover?
Go Roam lets you use your Three plan allowance in over 70 destinations worldwide without extra roaming charges.
What is Wuntu?
Wuntu is Three's free rewards app for existing customers, offering exclusive deals and discounts across a range of brands.