Hard reset HTC One M9 Option 1
1. Go to Settings
2. Click on the menu About Phone
3. Next item Storage
4. Then click on Factory data reset
5. Mark opposite Factory Reset and Format disk
6. Click on Start cleaning
7. Reset will complete after HTC One M9 restart.
Hard reset HTC One M9 Option 2
1. Need to turn off the smartphone HTC One M9
2. Press Volume Up + Turn on for a few seconds
3. Stop pressing the buttons when we see the brand logo on the display
4. Click Clear Data
5. Click on Start
6. The reset process will end after HTC One M9 restart.
Attention!
To fully perform a complete reset of HTC One M9, a battery charge of about 80% is required.
When the reset is completed, all personal applications and data installed in the memory HTC One M9 will be erased.