And probably dramatically more than have sold. Though some have questioned it I still think the Windows Phone Facebook App is a good indicator of how many phon

And probably dramatically more than have sold. Though some have questioned it I still think the Windows Phone Facebook App is a good indicator of how many phones have been sold. It's true that you don't have to install that app to use Windows Phone 7. But Facebook is pretty integral to the Windows Phone 7 experience so the Facebook App's growth is a good indicator of how well Windows Phone 7 is doing. On January 26th there were 366,000 users. Today it's 549,042.