O2 Ireland has revealed that it added just 6,000 net new subscribers in the quarter to 30 June 2006, bringing the total to 1.599 million users. Last week arch-rival Vodafone announced that it added 15,000 customers in the period, giving it a subscriber base of 2.090 million. O2 also said that despite service revenue climbing 3.3% year-on-year, ARPU remained flat at EUR46 (USD58), roughly a fifth of which is derived from data services. A more positive development for the Telefónica-owned cellco was the 8% hike in average user minutes of use (MoU), from 220 minutes in the previous quarter to 237 minutes. Paul Whelan, O2 Ireland’s chief financial officer, said in a statement: ‘The O2 Ireland business continues to deliver a strong performance.’ He called the Irish market ‘fiercely competitive’ and said that the company was pleased at its expanding customer base.