L720 galaxy s4 sprint go back to stock issue

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2far

Member
Apr 12, 2014
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http://xdaforums.com/showthread.php?t=2415587
http://xdaforums.com/showthread.php?t=2530610

I used those 2 threads trying unlock my L720, I followed everything up and It went smoothly It worked with (Simple mobile & Straight talk att sim card) but I was not getting a constant service, decided to go back to sprint and then, just trying to go back to stock firmware!

I am getting "Firmware upgrade encountered an issue.." in Odin every time that I try MDC, MK2 Stock firmwares says "FAIL! (Auth)" ?????
The only tar that is working is MDC modem tar found on the 1st thread used to downgrade modem to MDC, even though I was in NG2 which is the latest i was stock and rooted!
Then the phone boot up there's no sound no WiFi touch problems or is it the phone is really slow!?. I did a factory reset and nothing!
Another thing, but I noticed this since unlocked it! there is a picture too! Baseban and build are different!
Please any help would be appreciatte it!1 Thank you!
 

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