Actually Sprint had this on their phone. My unactivated HTC One had several OEM apps until I had it activated. Then the One "dials home" and installs all the carrier bloat/apps including Sprint Voicemail, Sprint ID (base package and skin), Sprint TV, etc. I've never seen a carrier activation change a device as much as this one did. HTC did some pretty slick imaging tools. And it almost appears as if you took the device and activated it on another network (radios and SIM allowing) that your device would be reprovisioned at that time with whatever custom carrier software was packaged for imaging for that network.