The following are guidelines to sweep away all data on the samsung galaxy S IV (T959, T897) and reset it to factory settings. I've tried it personally and it worked for me.
Congratulations, you now have factory reset the Samsung Galaxy S IV. Did it work for you?
- Power off the phone
- Press and hold VOLUME UP and HOME button
- Press power button to power on the phone. Release the Power button once the phone vibrates.
- Release all other buttons once you see the andriod logo.
- Select Wipe data/Factory reset with VOLUME DOWN button. Press Power button to confirm.
- Select Yes - delete all user data with VOLUME DOWN button. Press Power button to confirm.
- Select Reboot system now to reboot the phone after the process is done.
Congratulations, you now have factory reset the Samsung Galaxy S IV. Did it work for you?