Microsoft had made it clear that Windows 10 Mobile will be released sometime after the launch of Windows 10. While Microsoft later announced that Windows 10 will launch officially on 29th July there were no words about Windows 10 Mobile launch date. But now a leaked slide shows that Microsoft will make Windows 10 Mobile SKUs available to partners by late Q3, 2015.
This is inline with tip we received from our sources that Microsoft has been making efforts to deliver Windows 10 Mobile earlier than the expected end of the year timeline. Though once pushed to OEMs, it may still take sometime for the new devices to go through proper testing. So, while we may see some new device announcements in August-September, devices running the final build may start coming to market from October.