samsung j710mn imei 00000

I have a samsung j710mn that after repair the imei has been with the imei in 000000, I have the backup of efs and nv, I write the backups and it continues in 00000000

I also have the cert and it throws nv error when trying to write cert …. I have changed the firmware but I have the same result.

When I write firmware factory sw it tells me that I have problem with the modem, I install the latest firmware update same imei follows in 00000000

Still trying to repair the imei and now throws me the error of nv …