It looks like T-Mobile is now one of the last carriers that has yet to offer an Android 4.3 update for HTC One devices. The upgrade has already reached AT&T users and is now being deployed at C Spire Wireless.
As AndroidPolice points out, the major update to Android 4.3 Jelly Bean has been confirmed by HTC on its official website and aside from the said upgrade, HTC One from C Spire will also receive some bug fixes.
Software version 2.04.563.3 is now pushed OTA (over ... (read more)