. . . "Esat Digifone" . "O₂ Ireland" . "2015-03-02" . . "1997" . "acquisition of O2 Ireland's 2G network" . . "1787" . . "O₂" . "Acquired byThree(3) (2014)" . . . . . "Digifone" . "9.05E8" . . . . "O2 (Ireland)" . . "O2" . . . . . "Ireland" . "O2 (Ireland)" . "Telef\u00F3nica O₂" . . "O2 in Dublin" . "O2 Ireland" . . .