It will remove all the data ,contacts and apps that you installed
At the beginning switch your device off.
Press and hold the Volume Down button, and then briefly press the Power button.
Release held keys when you see Bootloader Mode.
Then press Volume Down to select option "Factory reset", and press Power button to confirm.
If the display is off, press the Power to turn it back on.
Afterwards go to Settings and then to Storage.
Tap Reset Device.
Choose Erase Everything if you are sure you want to clear all your data.
Select OK to confirm the whole operation.
HTC Flyer Restore Factory Hard Reset Format Phone.So lets start the HTC Flyer Restore Factory, HTC Flyer Hard Reset.Turn Off the mobile phone for few mints.HTC Flyer 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.