As a fellow Sprint customer really care about you. So, I will be perfectly honest with you. The Sprint Care reps don't know anything that isn't posted in the newsroom. So, you won't get an answer here. Additionally, there is no support for Windows within Sprint which is an unfortunate truth.
And as if on cue SprintCare shows up with the standard useless suggestion... Go to the newsroom! LOL
Anyway I thought the HTC already got the up date. HTC has confirmed that 8.1 update 1 is coming in October. At least HTC is saying something. Guess I should have included the link. I don't know if the 8X and the 8XT are the same or not though.