Do not install Windows 10 Mobile on a non-supported device
You are risking bricking a non-supported model
Mobile build 10536 is now live for Windows Insiders, but a detection bug makes this build available for some of the non-supported models like HTC 8X and others.
It is very important that you should not install Windows 10 Mobile builds on a device that is not in the list with officially supported models. Otherwise you can make the phone completely unusable (bricked), especially if there is no possibility to revert back to Windows Phone 8.1 using a software tool.
— Gabriel Aul (@GabeAul) September 15, 2015