HTC One M9 on T-Mobile receiving November security patches
Considering that the HTC 10 and HTC One M9 both got security updates around the same time last month, it's highly possible that HTC's flagship phone will be receiving the November security patches soon, or is even receiving updates as we speak. However, there's no way to confirm that from T-Mobile's website yet, as the device support pages haven't been updated.
To check if your smartphone is receiving an update, go to Settings > About > Software update > Check Now on your device. If there's an update waiting, be sure to be connected to a Wi-Fi network, lest you lose some precious data.
source: TMo News