Finally,
The IMEI Certi : PASS.
Why this happens? Due to unbackup efs fail before flashing the firmware. I messed up the cellular problems. That makes you cannot use your sim card to connect to cellular networks.
Usually when this happens your imei also will dissapear.
To fix this you need fix the certificate first by using Samsung Tool Pro 25 and z3x box to achieve this.
Write cert to your phone. And if after ztool is running and certificate still cannot be installed. Test using other certificate.
* Will update later for more details…
