Both the M7 and M8 will get unspecified "Wi-Fi calling enhancements" with their respective updates. In addition, the T-Mobile HTC One M7 will be upgraded to Android KitKat 4.4.3 with this over-the-air update. The M7's new software version number is 6.10.531.9, while the M8's new number is 2.22.531.6. Keep in mind that this update will roll out over the network over the next few weeks.
If you are an owner of either phone, are you happy about getting new updates?