Ok, I will keep at it... So to help let you know where I am at. I have a Verizon HTC one M8. It is currently running W10M 15254.401 after doing the offline upgrade to W10M I installed Interop Tools and mimicked as a Lumia 950 and has upgraded to the current level. With not many options out there, I am trying to see what is the best/better (from my opinion) windows phone on the Verizon network. I have an ICON at pretty much the same level, so they both kind of do they same thing. I do prefer some of the features of the HTC (camera is not a big deal for me). So the last hurdle for me to start driving the HTC as a daily driver is the Hey Cortana option. I read in another thread where a guy got it working on a 640 XL. I have the Interop Tool version 2.0.79.0 on the HTC and it lets me write/change registry values, but I can't write a new Registry Key Name. I tried following the GUS33000 for other OEM's and think that is where I am having my problem... Sorry for such a lengthy post, hopefully you guys can help me from there, I do appreciate all the assistance...