The HTC One M9 has anti-theft and may affect how customers are able to master reset the device. To use anti-theft, follow these steps:
At least one Google account must be set up on the device.
The device must have a screen lock (password, PIN, or lock pattern) enabled.
Once a screen lock and a Google account have been set up, the device is automatically protected against unauthorized factory reset.
The reset protection features will be disabled if the Google account is removed from the device or the screen lock is disabled.