It will remove all the data ,contacts and apps that you installed
In order to switch off the device, hold down the Power key for a short while.
Now hold and press Volume Down + Power button for a few seconds.
You can release held keys when you see three Android images.
Select option FACTORY RESET to browse use Volume buttons, and to confirm press Power button.
After this operation phone will reboot.
Power on your device.
Tap Menu key, and then go to Settings.
Find and select Backup & Reset.
Choose Reset phone, and tap Erase everything.
HTC Desire 600 Restore Factory Hard Reset Format Phone.So lets start the HTC Desire 600 Restore Factory, HTC Desire 600 Hard Reset.Turn Off the mobile phone for few mints.HTC Desire 600 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.