[Q] Galaxy S3 - wrong ROM, no longer finds SIM, no sound or mic topic

I flashed a new ROM On my ATT Galaxy S3, unfortunately I grabbed the wrong file ( it was for an S4) and soft bricked the phone. I was able to download a new stock rom, but while it looked fine, it can no longer find the SIM card. It thinks there is nothing there, also there is no sound (with speaker or headphones), and mic doesn't work. I have tried several different ROMS from Cyanogenmod, SLIM etc.. all with the same results. Software seems fine, downloads apps etc.. but same issues with those pieces of hardware. Maybe more I just havent found out yet. Any suggestions what happened, or if it can be fixed/reversed? Did I just ruin my phone? Help! LOL