It will remove all the data ,contacts and apps that you installed
Switch on your phone.
Scroll to Settings -> User and Backup -> Factory Data Reset.
Accept informations in your device.
Make sure, that your phone is off.
Then hold and press Volume Up + Power button + Home button.
Release all buttons when Samsung logo appear.
Then you will see menu of Recovery Mode, then release all buttons, and select option "wipe data/factory reset" with Power button.
Next choose "yes" using Volume Down and to confirm use Power button.
After that press Power button to enter option "reboot system now".
Turn on your handset.
Next tap this code: *2767*3855#
After that your device will reset and restarts.
Samsung Galaxy S5 G9008V Restore Factory Hard Reset Format Phone.So lets start the Samsung Galaxy S5 G9008V Restore Factory, Samsung Galaxy S5 G9008V Hard Reset.Turn Off the mobile phone for few mints.Samsung Galaxy S5 G9008V Remove Pattern Lock.
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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.