Reset of Samsung Phone through settings.
 

1. Open the Settings menu.
2. Select “General Management,” which in on the bottom of the page.
3. Select “Reset” from the menu.
4. Select “Factory Data Reset.”
5. Make sure to read everything on the screen before you select “Reset Device.”
6. Type your pin or password in the required field. Draw your unlock pattern if that’s how you unlock your phone.
7. Select “Delete All.”
    

Reset of Samsung phone through Recovery Mode.
 

1. Turn off your phone and wait for a few seconds.
2. Press the Volume Up button and Power button at the same time.
3. When the Samsung logo appears, let go of the Power button, but keep holding the Volume Up button until the phone enters recovery mode.
4. Once the phone is in Recovery Mode, let go of all the buttons.
5. Select “Wipe Data/Factory Reset” using Volume Down and use the Power button to confirm the selection.
6. Select “Yes – Delete All User Data” by using the Volume Down button. Press the Power button to continue.
7. After the process ends, select “Reboot System Now” and press the Power button.