As we revealed yesterday, Microsoft today started rolling out Windows 10 Mobile to existing Windows Phone devices. Specifically, Microsoft is starting with the Lumia 435, Lumia 535, Lumia 635 (1GB of RAM), Lumia 640, Lumia 640 XL, Lumia 735, Lumia 830, and Lumia 930.
A handful of devices have already shipped with Windows 10 Mobile (the Lumia 950, 950 XL, 650, 550, Xiaomi Mi4, and Alcatel OneTouch Fierce XL). However, this is for existing Windows Phone devices — Microsoft originally planned to start updating in December 2015, however, ended up delaying until Q1 2016. Internally, the timeframe became February and then March. Here we finally are.
Microsoft recommends downloading the Windows 10 Upgrade Advisor app from the Windows Store. It will tell you if the upgrade is available for your device and what steps you need to take.