It will remove all the data ,contacts and apps that you installed
First of all turn off your device by holding the Power key for a couple of seconds.
Then press and hold together: Volume Up + Home + Power button.
You should release held keys when the Samsung Logo appears on the screen.
In the next step select "wipe data / factory reset" using Volume buttons to navigate and Power button to confirm.
Afterwards choose "Yes -- delete all user data" to confirm whole operation.
In order to restart the device select "reboot system now".
Congratulations! Your device is ready to use.
At the very beginning switch on the tablet by using the Power key.
Afterwards go to Settings and then to Backup & reset.
Tap Factory Data Reset and then Reset Devive.
Choose Erase Everything if you are sure you want to clear all your data.
Finally, select OK to confirm the whole operation.
Samsung Galaxy Tab 3 V Restore Factory Hard Reset Format Phone.So lets start the Samsung Galaxy Tab 3 V Restore Factory, Samsung Galaxy Tab 3 V Hard Reset.Turn Off the mobile phone for few mints.Samsung Galaxy Tab 3 V 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.