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Three Discount Codes

50% Three Voucher - Save today!

Free codes - 11 available

Three is a mobile network provider. It sells mobiles phones as well as internet subscription plans to keep you connected. Their internet packages are paid monthly with an option of pay-as-you-go service. You can use a Three discount code to save money on your phone purchase.

Valid until 31/12/2023

This voucher is unverified

This voucher is unverified

Valid until 31/12/2023

No expiry date

Valid until 31/12/2023

Valid until 31/12/2023

Valid until 03/02/2024

Valid until 03/02/2024

Valid until 03/02/2024

Valid until 31/12/2023

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Recently Expired Three Discount Codes & Promo Codes

Feel free to try one of these Three discount codes that may still work.

Valid until 03/12/2023

Valid until 07/07/2022

Valid until 22/08/2023

Valid until 07/08/2023

Valid until 03/08/2023

Valid until 24/07/2023

Valid until 16/07/2023

Valid until 07/07/2023

Valid until 28/06/2023

Valid until 28/06/2023

Valid until 26/06/2023

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Tested on 08/11/2023

No expiry date

Last tested 2 days ago

Valid until 09/01/2024

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Explore All Valid Three Deals & Sales for December 2023


Three Voucher Details



Three Deal: Free Click and Collect Service

31 December 2023


Score 20% off Your Order at Three

No expiry date


Receive 10% off on Krispy Kreme Orders using Mobile App at Three

No expiry date


Three: Up to 50% off Student Discount plus Free Gifts

31 December 2023


Three Deal: Get 30GB Plans for £9 per Month

No expiry date


Free Delivery on Orders at Three

31 December 2023


Three Deal: Get the Exclusive Deals and Latest Promotions with Mobile App Download

31 December 2023


Get Unlimited Plan (24M) for £22 at Three

03 February 2024


120 GB (12M) for £10.00 only at Three

03 February 2024


Grip & Stand Mobile Accessories from £9 when you Redeem this Offer

03 February 2024

Useful tips and information

Three Voucher Codes

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.