before you do anything is this for a phone on the 4.3 ota or a phone going to the ota?
keep in mind if it is on the ota this file will brick the phone. if your going to the ota keep in mind there is a dangerous root that can brick it and there is little to no hope for a boot loader unlock as this phone is almost 3 years old now and the ota is likely the last update it will receive from samsung so if you wish to go to 4.4 based roms that will be impossible if on the ota...
HTC Droid Incredible slcd (retired)
Samsung Galaxy S3 pebble blue
Galaxy tab 3 7"
Rooted waiting for roms
Asus memo smart 10