Problem with samsung avant G386T1

Hello friends, i have a big problem with a Samsung avant form metro pcs, the problems is next, somebody try to unlock that cell but in the proces of unlock the cert file was corrupt, i reading for the forum i founded flashing the qcn the problem was solved but i didn’t cant solved yet. I continues reading and i found flashing the cert file the problem with the file cert is solved and take coverage against, but i found the right file cert, i download file cert for g386 and z3x say this: Not supported model (Unknown KEY ID), then i supposed i need the right file, if someone can help me i appreciate so much, the file i need is the cert file for g386T1. Thank you very much