Resetting the HTC One Max hard resetPerforming a factory reset using hardware buttons. All data will be lost!
If you can’t turn HTC One max on or access settings, you can still perform a factory reset by using the hardware buttons on HTC One max.
Important: The Fast boot option in Settings > Power must not be selected.
Press and hold the VOLUME DOWN button, and then press and hold the POWER button.
Wait for the screen with the three Android images to appear, and then release the POWER and VOLUME DOWN buttons.
Press VOLUME DOWN to select FACTORY RESET, and then press the POWER button.
or from settings
Go to Settings, and then tap Backup & reset.
Tap Reset phone.
If you also want to delete media and other data on HTC One max, select Erase all data.
To delete media and other data on your storage card, tap Erase SD card.
HTC One Max Soft resetIf the display is off, press the POWER button to turn it back on. If you've set up a lock screen, you need to unlock it.
Press and hold the POWER button, and then tap Restart. When asked to confirm, tap Restart.
If HTC One max does not respond to touch or can't press the buttons, you can still restart it.
Press and hold the POWER and VOLUME UP buttons for at least 10 seconds. HTC One max then reboots.