SAN FRANCISCO, United States (AFP) — Apple announced Wednesday the sale of its billionth iPhone, a milestone for the company as it seeks to keep momentum in a competitive smartphone market. Chief executive Tim Cook made the announcement at a staff meeting at the company’s California headquarters. “IPhone has become one of the most important, world-changing and successful products in history,” he said in a statement. “It’s become more than a constant companion. IPhone is […]