Three Discount Codes & Vouchers

Written by Eliza Macinnes
Learn more about this author

Three student discount

With the Three student discount, you can save up to 50% on SIM-only deals and 20% when you purchase a device with your contract. Secure the half-price student deal by signing up with UNiDAYS and verifying your student status. Upon successful verification, the student code will be automatically sent to your inbox.

Three birthday discount

It's always worth checking your inbox when your special day arrives. Three sends out attractive birthday discounts that offer price reductions on your next order.

How to use your Three voucher code

On the hunt for great bargains when shopping for a new smartphone or SIM-Only deals, make sure to pick one of our Three vouchers before placing your order. That way, you'll be sure to secure big savings. Simply copy the code, pick the smartphone or contract you'd like to buy, and proceed to the payment section. You can paste your Three coupon code into the box "Promo code". Clicking on "Apply" will reduce your total by the promised discount.

What to do if your Three discount code isn't working

In some cases, you may run into an error code while redeeming your Three promo code. If so, pay attention to the following tips:

• Only use codes meant for your customer group.

• Verify whether the code is meant for the selected Three offer.

• Ensure you've exceeded the minimum order value of your code.

• Exclusively apply valid coupons.

Can I benefit from any existing customer deals?

As an existing Three customer, you can take advantage of several cashback offers. For instance, secure an attractive cashback for SIM-only orders or when you purchase the newest smartphone. All of the available cashback deals can be found right here on our Voucherbox website.

Three first order discount

New customers have the opportunity to get the first three months for free when purchasing a SIM-only plan. Take advantage of the exclusive Three offer by choosing the plan that works best for you and clicking on "Buy now". The free months will be automatically credited to your account and billing will only start once the first three months have expired.

Does Three offer a blue light discount?

Blue Light Card holders can regularly take advantage of discounted SIM-only plans at Three. Here's how to claim the attractive NHS discount:

1. Log in to your account on the Blue Light Card platform.

2. Use the search bar to find the Three discount code.

3. Copy down the code and use it at the checkout.