About O2

Find out what we’re all about

Who we are

O2 is a leading communications company with over 1.5 million customers, as of December 2013. O2 runs 2G and 3G networks in Ireland, as well as owning half of Tesco Mobile and providing network services for 48.

It operates O2 Media, a mobile marketing division, and is home to a Wayra academy for accelerating startups. Based in Dublin and Limerick, O2 employs 900 people; has a retail network of nearly 70 stores; and sponsors The O2 music venue in Dublin and the Ireland Rugby Team.

A brief history

We began life as Esat Digifone in Ireland in 1996. In 2000 British Telecom acquired Esat Digifone and later demerged its wireless division, called mmO2, in 2001. In 2002, mmO2 rebranded and the O2 group of companies was officially launched. In March 2006, the O2 group was acquired by Telefónica S.A.

In June 2013 Telefónica agreed to sell its 100% stake in Telefónica Ireland to Hutchison Whampoa, operators of Three.

This deal was cleared by the EU in June and on 15 July 2014 Three fully completed the acquisition of O2.

O2 and the community

In O2 we aim to give back to the communities in which we live and work and take responsibility for our impact on society. We operate CSR programmes across the workplace, community, marketplace and environmental pillars of our business operations. For instance we have a charitable partnership with Headstrong, the National Centre for Youth Mental Health, where we dedicate our resources to making a real difference to youth mental health in Ireland.

We also recognise our responsibility to provide advice around issues like child protection and mobile phones, and safe driving to our customers. Our CSR work has been recognised as best in class on national and international levels as O2 was awarded the Outstanding Achievement in CSR Award from Chambers Ireland in 2012 and last year we won the first European CSR Award in Ireland (supported by EU Commission) for our work with Headstrong.

To find out more read our latest Corporate Responsibility Report here.


O2 & accessibility

We want all our customers to get the best out of our services. Whatever their age. Whatever their needs and abilities. Find out what we’re doing about it.


Regulatory Information

Mobile Termination: This information on Mobile Termination Rates (MTR’s) is published pursuant to ComReg Decision Notice D12/12.

Telefonica Ireland Mobile Termination Rates.  //  Telefonica Ireland Reference Interconnect Agreement

Wholesale Roaming: In accordance with Article 3 of the Roaming Regulation [(EU) 531/2012] Mobile Network Operators must meet all reasonable requests for roaming access. The attached roaming access reference offers provide required details for access seekers to Telefonica Ireland network roaming services.

Wholesale Roaming Access Agreement.  //  Wholesale Roaming Access (Resale) – Provided in conjunction with Telefonica Group Partners.