Launched in 2005, Three has to date invested almost €2 billion in building their Irish business and in July 2014, completed a deal to purchase O2 in Ireland. Three is now Ireland’s second largest mobile operator with 35% market share and two million customers (as of March 2018).

Three operates 2G, 3G and 4G networks, with 96% coverage nationwide. Three Ireland will invest a further €300m in building their state-of-the-art 4G network over the next two years.