The four-year deal is worth €7.5 million, starting from next Wednesday’s friendly against Argentina in Dublin.
FAI chief executive John Delaney said “3 is a new and dynamic brand in Ireland and their determination and drive will bring fresh energy and focus to the partnership.
“This is significant sponsorship which is structured to reach out as never before to engage with grassroots football and all the strands of the game that we represent. It is a significant investment in the future of Irish football, particularly in light of the current economic climate.”
The mobile phone operator will offer customers access to match tickets and other football-related initiatives.
