That sounds good. How do I go about doing that?
		
		
	 
This is the steps : 
Windows computer needed 
Latest Odin can Google it from XDA Forums  and download the latest should be Odin prince comsey  3.14.1 / and Frija tool or samfirm (i usually  download both) 
Download samfirm v0.4.1 tool and frija, extract it with 7zip. 
You will extract files for Odin  prince comsey 3.14.1once download with 7zip and will do same for firmware with 7zip . 
Put your model  number then region and select check for updates , then download the FIRMWARE , extract the FIRMWARE with 7zip. 
There will be 4 files after you extract the firmware 
BL 
AP 
CP 
CSC 
Each of those files will go in Odin when you open to the corresponding slots 
BL 
AP 
CP 
Home slot don't out anything 
CSC USE HOME CSC FIILE TO SAVE DATA /THIS ONLY GOING BETWEEN CARRIER FIRMWARE OR IF YOUR ON UNLOCKED GOING BETWEEN UNLOCKED FIRMWARE 
If you going from carrier to unlock firmware keep regular CSC not home CSC and do a back up it will factory reset the device. 
connect your phone with cable to computer , once the files are in its slots hit start, once done you'll see pass in Odin and it will reboot
*Make sure you put phone in download  mode 
*If dont see your phone connected  in Odin change cables or ports in computer .  
*Never disconnect the cable in middle of flashing.