There were lots of rumors and leaks indicate that Microsoft will use NT kernel as the operating system of Windows Phone 8 'Apollo'. Now we see some real hard evidence inside Windows 8 Consumer Preview bits. There is a string says 'PhoneNT' inside the binary image of NT kernel: ntoskrnl.exe file. Apparently its a new 'ProductType' of NT system. We've seen 'WinNT'/'ServerNT'/'LanmanNT'/'EmbeddedNT' before, and will see 'PhoneNT' in the future.