Trusted Reviews is supported by its audience. If you purchase through links on our site, we may earn a commission. Learn more.

Best O2 Discount Codes March 2025

£100 OFF
Coupon

O2

Snag £100 off the Samsung S23 Ultra with this O2 voucher code
 
Chop £100 off the upfront cost of your new Samsung S23 Ultra. Dive into the latest technology without breaking the bank!
 
More Less
Get Deal

About O2

One of the largest phone providers in the UK, O2 offers deals on phones and plans, with SIM-only deals, Pay As You Go, and monthly contracts with low upfront costs. You can upgrade your device online and save money with a discount code. 

This page will highlight the latest O2 promo codes available. With flexible plans, you can get unlimited data, talk time, and texts to suit your individual needs. 

The company frequently rolls out sales and limited-time deals, allowing you to get the most out of your service. Watch out for seasonal discounts, top-up vouchers, and affordable contracts on the latest Samsung, Google, and Apple iPhones or smartwatches. 

How to use O2 discount codes

  • Step 1: Add your chosen product or contract to your basket
  • Step 2: Go to your basket and scroll down until you see the “Got a promo code?” section
  • Step 3: Add your O2 discount code and submit it
  • Step 4: Checkout and enjoy your savings

How we source coupon codes

The Trusted Reviews team sources all discount coupons directly, ensuring our readers are getting the best savings possible. We aim to keep this list updated as frequently as possible with the latest and best discounts on the most relevant items and services. For further detail on how we source our coupons please visit our information page here If you have any issues using these codes, please let us know at editor@trustedreviews.com.

FAQs

How do I use an O2 discount code?

Click on the O2 voucher or discount code you wish to use and head to its site. Add devices and phone service to your cart. Add your O2 code to the ‘Promo Code’ box during checkout to claim the discount

Does O2 have a student discount?

Students can save 20% off their Airtime plans with the O2 student discount! Verify your student status to receive a unique O2 promo code to save on a phone upgrade or new phone contract. 

Are there any discounts on O2 family plans?

Customers can add multiple lines to their accounts and receive an O2 discount of 20% for each line. Up to 20 lines are eligible for a discount, 5 of which can be Refresh upgrades.

Can I get an O2 NHS discount?

Yes, O2’s NHS discount provides 25% off eligible Airtime plans. Provided through O2 Open, you can check eligibility by texting ‘Open’ and your company’s name to 61202. You will then receive an O2 discount code for NHS staff, which can be added to a new Refresh contract within the first 28 days.

What kind of discount does O2 have for teachers?

Teachers can receive a discount under the O2 Open programme for essential employees and community heroes. Visit the website to verify your status with an academic ID or email address, and you can receive 25% off your airtime plan, and a get a new phone on a Pay Monthly contract.

How can I get my O2 phone unlocked?

Most devices sold after 2018 will already come unlocked at O2. If your device is locked, you can ask O2 to unlock it at any time, free of charge. Find more information on the website here, and contact customer service for any assistance.

Does the O2 network have 5G coverage?

Want to know more about the network’s coverage across the UK? Look at the O2 network coverage map online at any time to see the current range available, including 5G connectivity and wireless hotspots.


Why trust our journalism?

Founded in 2003, Trusted Reviews exists to give our readers thorough, unbiased and independent advice on what to buy.

Today, we have millions of users a month from around the world, and assess more than 1,000 products a year.

author icon

Editorial independence

Editorial independence means being able to give an unbiased verdict about a product or company, with the avoidance of conflicts of interest. To ensure this is possible, every member of the editorial staff follows a clear code of conduct.

author icon

Professional conduct

We also expect our journalists to follow clear ethical standards in their work. Our staff members must strive for honesty and accuracy in everything they do. We follow the IPSO Editors’ code of practice to underpin these standards.

Trusted Reviews Logo

Sign up and get the best deals straight to your phone

Skip the hunt - get the latest discounts delivered directly to WhatsApp by signing up to the Trusted deals Whatsapp Channel.

Get Access