T-Mobile's HTC One M9 starts receiving Android 7.0 update0
The update weighs in at 1.09GB and is software version 4.27.531.6. When you receive notification that the update has arrived, make sure that you are on a Wi-Fi connection, and that your battery is fully charged before starting the updating process.
Android 7.0 brings Multi-Window split-screen multitasking, customized Quick Windows, improved notifications, and an enhanced version of Doze that keeps your apps from connecting to the network when the phone is not in use. The latest version of Unicode is included, allowing you access to the latest emoji. Besides Android 7.0, the update includes the February security update, and performance enhancers (not steroids) for the phone.
While T-Mobile's support page for the HTC One M9 shows that the update is in the testing phase, judging from screenshots we've seen, some T-Mobile subscribers are rockin' Nougat on their One M9 right now.