Hard Reset HTC M4 Android Smartphone

HTC M4 Hard Reset 

•  Push and hold the VOLUME (-) button , and press and hold the POWER button . 
• Await the display with the 3 Android images to appear , after that release the POWER and VOLUME (-) buttons . 
•  Press VOLUME (-) to choose FACTORY RESET , and then press the POWER button .  Factory reset will completely erase all your data and customized settings , and will remove any applications you've downloaded and installed . Make sure to backup any data and files you wish to keep before you decide to do a factory reset .