Project My Screen now works fine with Windows 10 Mobile on all devices while connecting via USB. Project my Screen over WiFi still works only with Windows 10 Mobile / PC Redstone Build 14328 and higher. You can check our tutorial on how to set it up by clicking here.
We shared the info earlier that Project My Screen feature has started working on Windows 10 Mobile devices but only via USB connection. Good news is that with the latest Windows 10 Mobile & PC Redstone Builds 14328 it is now possible to do so over the Wi-Fi too.