It will remove all the data ,contacts and apps that you installed
At the very beginning switch off your smartphone by holding down the Power key for a short while.
In the next step press and hold the Voluem Down + Power button for a couple of seconds.
When you see the three Android images, then release held keys.
Then press Volume Down to scroll to option "Factory reset", and press Power key to confirm.
Good job! The hard reset has just been performed.
If the display is off, press the Power button to turn it back on.
Then from Main Menu go to Settings and tap Backup & reset.
Afterwards choose Reset phone and select Erase all data.
Tap OK to confirm your choice.
Success! The hard reset is done.
HTC One E9+ Restore Factory Hard Reset Format Phone.So lets start the HTC One E9+ Restore Factory, HTC One E9+ Hard Reset.Turn Off the mobile phone for few mints.HTC One E9+ Remove Pattern Lock.
Hard Reset,Restart Problem,Restart Solution,Restore Factory,
Restore Hard reset will set your phone in origional factorry settings. It will remove all the data and apps that you installed. Your contacts will be removed and you have to add them again.