No Network Connectivity after failed root

Hello guys I was trying to root my Lg G pro E980 for AT&T. In my haste and eagerness to attain root on my device, I failed to notice some of the warnings in the OP. This is what I used to try to obtain root: http://xdaforums.com/showthread.php?t=2362657 As you can see, it states that it does not work on AT&T 10p. After trying (and failing). My phone would no longer detect my sim card! I tried factory resetting with no luck. I also tried taking the sim card out and restarting without the sim and then reboot with the sim. This did not work either. Searching for networks yielded a network error. If it matters, my phone is unlocked and using a T mobile sim. I was working perfectly before the failed root attempt and now I get no service connectivity at all! Any assistance would be greatly appreciated!

Update: I flashed the phone to an earlier stock version of the AT&T rom using this: http://xdaforums.com/showthread.php?t=2302660 and it still does not seem to read my T-mobile sim or an AT&T sim either! Please, any help at all is appreciated!