Fix write CERT on s6 edge G925i and variants

[ndagi]

hi trying to fix imei on edge G925i and keep getting errors.

downgraded modem (actually file i got is same in phone and its version '3')

very low security level and still cant edit imei

got EFS and CERT file

EFS write and reset successful

CERT write failed

Repair failed

log:

Operation: Write CERT
Selected model: SM-G925I
Software version: 28.0

Waiting ADB device... Ok
Reading phone info...
Model: SM-G925I
Android version: 5.1.1
Product code:
Phone version:
PDA version: G925IDVU3DOJ6
CSC version: G925IUUB3DOJ6
CSC country code: TRINIDAD AND TOBAGO
CSC sales code: TTT
HW version:
Phone SN: 00000000000
Chip name: EXYNOS7420
Modem board:
RF cal date:
IMEI:
Checking Super user right... true
Reading NV data... Ok
Checking NV data... Ok
Initialization zTool... Ok
Running zTool, please wait...
Start...
Card error Ok
Initialization... error (error(2))
Reading data... error
Security damaged (4 23)

Done with Samsung Tool PRO v.28.0


Any help be appreciated really fast i hope.