HTC 8 WindowsPhone requires an activation code
Guys we have had so many people contacting us on this issue. In the past there have been results that's we have been able to help you get the activation codes. But seriously not any more.
Last time I spoke to a Microsoft Answer Desk assistant, I was told support for non Lumia/ Microsoft devices had ended. So technically there's no way of getting the activation codes.
Also the OS has moved on and the HTC's are not upgradeable to Windows 10 Mobile.
But just incase anyone has been able to hack his/her way to make windows 10 mobile available on the HTC 8 S and X you should share or let us know we'll send all callers to you sharp.