Make sure, that your cell phone is off. Then press and hold Volume Down + Power button for a while. After that you should see the three Android images, then release held keys. Now you will be in Bootloader mode. To enter the Fastboot mode, use Volume Down to scroll to option "Fastboot", and confirm that using Power button.
Let's download the latest version of HTC drivers by using our free link. Download HTC One M9 Drivers. The HTC USB drivers installation files will be compatible with Android 5.0 Lollipop system and older OS. All HTC One M9 introduced 2015 and powered by Qualcomm Snapdragon 810 MSM8994 will work with those drivers.
How To Change Language in HTC One M9+? At the very beginning find and select Settings. Afterward, scroll down to Language & Input and choose it. Then select from the top of the screen Language option. Excellent! Now you have access to the full list of available languages. Here you have the video tutorial with the whole process:
Check if the phone is in Sleep mode. First, check if the phone is actually powered off by pressing the POWER button. If the screen immediately returns to the same screen as before, then the phone did not power off. The screen automatically turns off after a certain period of time, which is normal.
Page 137 Resetting HTC One M9 (Hard reset) If HTC One M9 has a persistent problem that cannot be solved, you can perform a factory reset (also called a hard reset or master reset). A factory reset reverts the phone back to its initial state—the state before you turned on the phone for the first time.
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htc one m9 hard reset
