We got an information from some of the trusted sources that Windows phone 7.5 or mango will be released in the month of October some where in the mid. With this said
" Currently Windows Phone’s market share is very small, not only users’ level of knowledge for the Windows Phone is not very high, even professional mobile phone dealers have little enthusiasm for the current Windows Phone, compared with Android and iOS. However Microsoft is very confident, said that next year will make great progress,especially after Nokia joining Windows Phone camp. In addition, the relevant survey also showed that the vast majority of users currently are holding a wait and see attitude, looking forward what a change the Nokia’s Windows Phone will occur? "