Or perhaps, "Windows Phone sales in the last 3 months double in Europe based on estimate derived from interviews of consumers" Cite: http://venturebeat.com/201

Or perhaps, "Windows Phone sales in the last 3 months double in Europe based on estimate derived from interviews of consumers" Cite: http://venturebeat.com/2013/09/30/windows-phone-doubles-share-in-europe-trails-iphone-by-only-1-in-germany/ http://venturebeat.com/2013/09/30/windows-phone-doubles-shar... "... reflects the latest three months of actual smartphone sales, which the research company gets by interviewing actual consumers."