best-selling mobile device platform "iPhone market share shrinks as Android, Windows Phone grow" best-selling mobile device platform "iPhone market share shrinks as Android, Windows Phone grow" "iPhone market share shrinks as Android, Windows Phone grow" "iPhone market share shrinks as Android, Windows Phone grow" "iPhone market share shrinks as Android, Windows Phone grow" "iPhone market share shrinks as Android, Windows Phone grow" "iPhone market share shrinks as Android, Windows Phone grow" best-selling mobile device platform "iPhone market share shrinks as Android, Windows Phone grow" "iPhone market share shrinks as Android, Windows Phone grow" hier "iPhone market share shrinks as Android, Windows Phone grow" "iPhone market share shrinks as Android, Windows Phone grow" "iPhone market share shrinks as Android, Windows Phone grow"