EFS FOLDER needed? maybe...

I rooted my phone, everything was fine running SpaceX Kernel until i started getting reboots. i flashed arters kernel and when my phone restarted from odin i got a message saying : This phone has been flashed with unauthorized software and is locked. the phone won't connect to the network. if i flash the stock firmware with stock kernel it won't boot for some reason. It only boots up with a rooted kernel but my baseband says unknown and my imei is null. if i flash darthstalker ROM i get the baseband back but imei is still null, i tried changing the imei and masking it with apps but no luck. people keep saying that my efs folder got corrupted... so i was gonna try copy somebody's folder to see if my phone connects to the network. that's where I'm at, this sucks and I'm desperate for help. by the way, right now I'm running stock COI5
Anything will be appreciated.