mobile

I have a rooted sprint galaxy S4 SPL-L720 with build version L720VPUFNG2. I need to change it to L720VPUAMDC build. I already have the tar file downloaded. for MDC. Reason for this is to able to unlock the phone here in the US. I just need to know how to use Odin for this. If someone could please point me to the information on how to do this I would be grateful. Thank You. BYW My firmware is 4.4.2