1. Download the attachment. 2. Extract it. You will get a .tar.md5 package 3. Start your device into ODIN mode by pressing VolDown + HOME + POWER button on your Galaxy Trend S7392. 4. Run ODIN and connect your device to your PC using USB cable. 5. Browse for the .tar.md5 file from "PDA" section. Select the recently extracted .tar.md5 package. 6. Flash it.