Will Microsoft actually make Windows Phone 7 Mango available in September? Perhaps, as there is a new rumor making its rounds on the Internet that Microsoft has picked September 1st as the release date for Windows Phone 7 Mango. According to Pocket-lint, they say that via “multiple trusted sources”, this is the date you should look out for – as it is a day just before the IFA 2011 consumer electronics trade show in Berlin begins. Needless to say, one can make a reasonable assumption that there will be a bunch of Mango-powered smartphones at the show once Microsoft steps forward to make the announcement.