In order to hard reset a Samsung Galaxy S Blaze 4G T769, you should perform the following steps.
Remember! Hard reset will delete all the data on your device; pictures, contacts, messages, apps and more.
Samsung Galaxy S Blaze 4G T769 device will be brought back to the default configuration of a brand new device.
1. Power down the phone.
2. Press'n'hold the Volume & Power buttons. Let go of Power button when the phone vibrates.
3. Recovery menu will appear on-screen. From it, select wipe data/factory reset.
4. Select Yes and then Reboot system now.