How to unlock bootloader on a Sprint Galaxy S3?

[Mushimumu]

I have already rooted my phone and wondering how to unlock the bootloader? I've searched around and only found methods for the verizon version!!! Help appreciated!

 

[MrPeebles_]

Use this:
https://dl.twrp.me/d2spr/ This is the bootloader you would want to Odin
Steps:
1) Download Odin
2) Go into download mode (power button, down volume button, middle button whilst phone is off)
3) Place the installed file that I just linked you above into PDA and click start (also make sure if the phone thing is popping up)
4) Install it should take 10 secs
And you're done.