SM-N910P Write Cert but no signal! Help

Dialed *#0011# and in IMEI Certi it says FAIL, -9

How do i fix this? i get no signal. Heard i need to change meid or something like that but to be honest i dont know how. I dont have a valid QCN file neither.
Phone is on 5.0.1. Its rooted and already domestic unlocked and normal unlock.
I wrote the certificate becuased it was blacklisted.

Please if anyone know the answer to my question. Heard you needed to use a program called DFS CDMA tool or something like that.
Step by step guide appreciated!! *** bless happy new years. I dont have my logs i closed OCTOPLUS by accident.