If you are living in the US and owning HTC One M9, good for you – Verizon is upgrading its units of the phone with a Nougat 7.0 OS. Update will include the latest security patches and bug fixes, too. Some of the more noteworthy features that 7.0 brings are split-screen view, quicker multi-tasking and more reply options.
The update is already available. Before downloading, make sure that your phone has plenty of power left and is connected to a wi-fi. Also, do not count on One M9 getting more major updates like this one – it is doubtful that you will ever get a newer OS on that particular device.