comScore has released latest data, which shows us how platforms are doing in the US with regards to marketshare percentage. Microsoft has been losing market according to previous charts but this is not to be taken lightly. The total number of users is increasing quicker than Windows Phones are being sold (the platform fell by 0.2%), and this September data is still before the month Mango devices began rolling out. 2012 will be when the platform begins to gain ground and keep up with the growth of the iPhone.

Let's wait and see what the next chart will show once Nokia's massive promotion campaign is included.

Source: comScore