No LTE on E980 PLEASE HELP!!!

Have always been able to receive LTE up till a couple days ago. I flashed Lollipop and wasn't getting good reception so I flashed back to 4.4.2 KK and now I don't get any LTE connection?? could the lollipop ROM have changed the kernel or basedand of the phone? anyone know the stock kernel # and baseband #? What about the antenna, if it where to go out/bad would I still be able to pick up a 4G signal??

Thanks in advance...