2014-04-29 Kantar調査:Windows Phone、Android価格戦争の中を「つっかえつつ前進」。iPhone 5sはAppleの緩衝材 - TechCrunch http://m.jp.techcrunch.com/2014/04/28/20140427kantar-windows-phone-stutters-amid-android-price-competition-iphone-5s-is-apples-buffer/