Ronan Dunne, Chief Exec of O2

Ronan Dunne, chief executive officer of O2 Plc, the U.K. unit of Telefonica SA, speaks during an interview in London, U.K., on Wednesday, April 1, 2015. Billionaire Li Ka-shing's Hutchison Whampoa Ltd. agreed in March to buy Telefonica's O2 wireless carrier in the U.K. for 10.25 billion pounds ($15.3 billion)