UpdatedEverything you need to know about Windows Phone 10. Or is that just Windows 10 now?
The Windows Phone 9 preview build might arrive early next year and it's said to be compatible with existing WP8 devices.
A leaked document points to an early-mid 2015 release for Windows Phone 9, though what it will entail remains a mystery.
A job posting from Microsoft suggests that Windows Phone Blue will be with us by the festive season this year.