The mobile phone giant saw year-on-year declines in almost every sector of its business, including voice, messaging and data revenue, and in most regions, the figures showed.Vodafone's revenue for the quarter ended June 30 totalled Â??10.77 billion (US$16.8 billion), down from Â??11.66 billion a year earlier, it said Friday.The only bright spots were small revenue rises in Turkey (up 3 p