Microsoft has released the Windows 10 Mobile preview build 14283 to members of the Insiders program who are on the Fast update ring
From Windows Central:
From Windows Central:
The update is currently available for Insiders on the Fast ring who own the Lumia 950, 950 XL, 650, 550, Xiaomi Mi4, and the ALCATEL Fierce XL smartphones. More phones will be added to this list in the future.Windows 10 Mobile preview build 14283 released to Insiders in the Fast ring