I installed the MJA upgrade (how to root sph-l720) I saw on youtube. after the rooting etc.. is when I lost sound. everything else worked (data) (wifi) (texting) (googleplay) etc......
I could only find one other modem to try, but like I said it failed to install.
after 3 days of browsing and getting things done by myself, I'm burned out and could really use help on this. I'm very new to this phone thing so please, if there is a way to fix this, be as detailed as possible.
I didn't have time to read forum rules so I didn't post any links cause I was not sure if I was allowed to. If I am and ya'll would like me to post where I learned the rooting and a so called fix to my problem. I can do that. just let me know.
this is the exact name of the youtube video i watched and all the root/rom/recovery etc.... that i used to do the rooting.
(How to Install Android 4.3 Custom ROM on Sprint Galaxy S4!) <---------type this on youtube.