O2 Discount Codes - save money this May

We check every deal and O2 discount code to make sure they work and will save you money at O2.

Offers last updated : 23 February 2024

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Get £250 on a prepaid MasterCard with selected O2 tariffs

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Used 2 times

Ends 11 July 2024

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Free delivery on selected orders with O2

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Used 1 times

Ends 26 July 2024

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Save £384 on the iPad 9th Gen in the Black Friday sale with O2

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Ends 18 November 2024

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Save up to £500 on Samsung Galaxy S22 at O2

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Used 1 times

Ends 18 November 2024

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Upgrade whenever you want with O2 Priority

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Ends 14 June 2024

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About O2

O2 is the trading name of Telefonica UK Limited. They are a highly established telecommunications, internet and financial services provider in the UK. The parent company, Telefonica forms part of the bigger picture; Telefonica Europe. The business is one of the largest mobile telecommunications provider in the UK, second only to EE.

 O2 logo

O2 was first formed way back in 1985 by John Carrington, under the name Cellnet. This was joint venture between BT Group and Securicor. However, in 1990 BT paid Securicor for their share in Cellnet, resulting in rebranding the company at BT Cellnet. Fast forward to 2002 and the first appearance of the O2 branding was a result of a spin-off company, O2 plc.

In 2005, the Spanish telecommunications company Telefonica successfully acquired O2 plc for £1 billion. As part of the terms of the deal, Telefonica agreed to continue using the “O2” brand and the company’s UK headquarters in Slough.

Apart from being a highly successful mobile phone company, O2 have diversified into finance, broadband and sponsorship markets. Highlights include becoming the official sponsor of the O2 Arena, formerly known as the Millennium Dome and the rebranded O2 Academy live music venues. O2 regularly use these sponsorship to their advantage, offering customers ‘Priority Moments’ allowing them up to 48 hours access to tickets prior to them going on general sale.

 The O2 arena


It is great to have a browse through the O2 website searching for the best deals and the latest phones. Just be sure to check out the perks page while you choose your next contract. You will many exclusive offers just for costumers as well as general perks that apply to everybody.

Some of these perks include access to all the expert knowledge of the O2 gurus as well as not to miss reductions on tickets to events in the O2 arenas.

Money back offers and savings are also another reason to visit the sight, 10% back on your pay as you go top ups are an amazing offers and they even has a text system that will alert you when something you might enjoy is going on near you. The company get to know you by getting you to fill out a quick form based on your likes and dislikes. 

Next time you find yourself in need of an upgrade be sure to think of O2 and start gaining those perks. 

Opening Hours and Contact Information

You can contact O2 about joining their network via telephone on:  08442 02 02 02

Lines are open Monday to Friday 8am – 9pm; and

Saturday and Sunday 9am – 5pm

You can contact O2’s pay monthly customer service team via telephone on: 0344 8090202

Alternatively, call from your O2 mobile on: 202

Lines are open Monday to Friday 8am – 9pm,

Saturday 8am – 8pm; and

Sunday 8am – 6pm

You can locate your nearest O2 store and their relevant opening hours via their store locator tool here:

Company Registration Information                

O2’s is the trading name of Telefónica UK Limited; registered in England and Wales. The company registration number is: 1743099

Head Office Address

260 Bath Road




United Kingdom

Latest O2 News

July 2014 – O2 has made 4G available in Northern Ireland as they continue to make the service available across the UK. Following a £15 million investment, the people of Northern Ireland can begin to enjoy the superfast 4G network that’s already available in some of England’s major cities.

June 2014 – O2 has begun taking their first orders for the much anticipated LG G3 smartphone. With several tariff options and deals, you can pick up the LG G3 from O2’s online store, now!