Windows Phone 7.x is CE kernal based; Windows Phone 8 is NT like Windows 8. Microsoft has plans to introduce Windows 8 Phones in the near distant future. The HTC Titan I (Eternity) was the last Windows Phone that the bootloader could be HSPL, nothing since has been successfully "hacked," though there is some talk the Huawei model has made some progress towards that goal. My only beef with the HTC Titan are the mobile data speeds seem to be throttled at Cat 8 not Cat 10 and Skype not being able to run in background; other than that, I'm happy with the device.