Valid Three Mobile discount codes for August 2026

1. Pick a working Three discount code on Latest Deals that matches the offer you want.
2. Click the orange

First, check the simple things. Is the code still valid? Is it meant for the product you're buying? Three's student discount, for example, uses code STUDY20 and only applies to selected airtime plans, SIM only plans, and Home Broadband plans under certain terms. Some offers also leave out things like device repayment costs or specific SIM plans.

If it still will not work, remove any other promo code, since a lot of offers cannot be used together. Then check that you entered it exactly as shown, with no extra space at the end. If the basket still rejects it, the offer may have ended or the item may not qualify.

Yes. Three offers 20% off selected airtime plans, SIM only plans, and Home Broadband plans on 12- or 24-month terms.

To verify, you need an active .ac.uk email address and code STUDY20 at checkout. In store, you may be asked for student ID. The discount does not cover device repayment costs, and some plans are excluded, including the 25GB and 120GB SIMs on a 24-month plan.

Yes. Three+ Rewards is the customer rewards app for eligible Three customers, and it is genuinely one of the nicer extras if you're already with Three.

It includes weekly and ongoing offers from brands like Caffè Nero, Cineworld, Uber Eats, Nike, and Trip.com. Some rewards have weekly claim limits and their own terms, so check the details before you tap claim. A few of the offers are proper everyday savers, like a £1 barista-made drink every week at 100s of local cafes and £3 Cineworld tickets at weekends.

Three uses different delivery services depending on what you buy.

• Phones, tablets, broadband devices, and accessories are usually delivered by DPD, normally next working day if you order before 8pm.
• Weekend or before-12 delivery may be available for a fee.
• SIMs are delivered by Amazon with tracked 2-day delivery as standard.
• Next-day SIM delivery is available for a fee.

Next-day delivery is not guaranteed to Northern Ireland and the North of Scotland, where it may take 2 days. Pre-orders are usually around 4 weeks, depending on stock.

For phones, tablets, and broadband devices ordered online, Three gives you 14 days from receipt to return the item.

Home Broadband Consumer customers get 30 days. Returns and exchanges are available, but Three does not say that all returns are free across every product type, so it is best to check the policy for your order. For money-back returns, Three asks customers to call the Returns Team.

We usually see the biggest Three sales around Black Friday and Boxing Day.

Three also has a latest offers page with current deals, so it is worth checking that too if you are hunting for a new phone, SIM only plan, broadband deal, or upgrade. At Latest Deals, we keep an eye on the price drops because, let’s be honest, timing matters quite a bit with mobile contracts.

In most cases, no. Three promo codes and Rewards offers usually cannot be combined with other promotions.

That is especially common with partner offers in Three+ and with code-based discounts such as student offers. If you try to stack codes, checkout will often reject one of them, so we’d suggest trying the strongest saving first.