How to Customize On Screen Buttons on HTC One M9
By default the navigation buttons on the HTC One M9 function as Back, Home and Recent Apps keys. But unlike the One M8, you can customize on screen ...
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Factoty reset deletes all the data, setting, installed app on Android HTC One. It is also known as hard reset, master reset. To do and perform factory reset on HTC One and other HTC devices, follow the instruction
1. Open "Settings" app
2. Find "BackUp & reset" and tap on it
3. Tap on "Reset phone"
4. Make sure to select "Erase All Data" if you want to delete the entire data of your device
5. hit "OK"