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.
Well done! The hard reset has just been performed.
Firstly turn on the phone by using the Power button.
Go to Settings and then to Backup & Reset.
In the next step tap Reset Phone.
Choose Erase All Data if you are sure you want to clear all your data.
Select OK to begin the whole operation.
Wait to complete the hard reset process.
Godd job! Your phone is ready to use.
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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.