Since motorola makes specific built moto x's for each carrier i wonder if it has something to do with the motorola "sprint" build. By the looks of this it seems that sprint acknowledges the problem. https://www.google.com/#q=problems+with+moto+x+on+sprint
Oh, not comforting.
And their go-to solution for all issues are, "Update PRL/profile or soft reset". I mean....sheeeesh.
Also, this:
https://community.sprint.com/baw/message/684345