G920A Unlock / Read CERT Security Damaged (1) Error HELP PELASE!

[GTrader]

Hello GSM Forums,

I have a G920A (S6 for AT&T) here. I have unlocked many of these phones without a problem through Z3X. I have a G920A here that I am trying to unlock and during the Unlock Process I get an error that says "Checking NV data...error - Security Damaged (1)" What does this error mean? I have never seen it before. How can I fix it?? This happens when trying to Read CERT as well. Here is the log.

Waiting ADB device... OK
Reading phone info...
Model: SAMSUNG-SM-G920A
Android version: 5.1.1
Product code:
Phone version: G920AUCU3BOI2
PDA version: G920AUCU3BOI2
CSC version: G920AATT3BOI2
CSC country code: USA
CSC sales code: ATT
HW version:
Phone S/N: 00000000000
Modem board: SHANNON333
RF cal date:
IMEI:
Checking Super user right... true
Initializating zTool... OK
Running zTool, please wait...
Start... OK
Init... OK
Generate and check client proof... OK
Verify proof by client... OK
Reading data... OK
Reading nv data... OK
Checking NV data... error
Security damaged (1)
Done with Samsung Tool PRO v.25.3

Is this a hardware problem? My IMEI is also messed up...How can I restore my original IMEI? I have no idea what happened. Please Help

[ghacks]

downgrade samsung tools for see what happen 25.3 have alot a bug for some models ..

[meido one]

"Phone S/N: 00000000000"

you have reset the EFS, your phone is already unlocked, anyway not possible with z3x to read cert under that condition. only option is writing nv_data backup to restore security.

[GTrader]

Originally Posted by meido one

"Phone S/N: 00000000000"

you have reset the EFS, your phone is already unlocked, anyway not possible with z3x to read cert under that condition. only option is writing nv_data backup to restore security.

I restore NV_data with an old backup. Now Phone is getting no signal and IMEI is unknown. Any way to fix this?

[hitibiti]

i get same problem with G920W

fixed
just write NV file that's it

[ghacks]

use 23.7 or 23.9 samsung tools the problem its samsung tools do u use it have a bug i'm 100000% sure.

[meido one]

Originally Posted by GTrader

I restore NV_data with an old backup. Now Phone is getting no signal and IMEI is unknown. Any way to fix this?

seems you restored nv_data from another phone.

[GTrader]

Pretty sure this phone cant be fixed guys. I sadly did not Backup Original Cert and now phone IMEI is 3500000000000000. I dont think I can fix this?

Thanks for the help everyone!

[atinder_2006]

It is still fixable, reset efs and write cert or patch cert

[MUNEEB_AKHTAR_RAZA]

I m also facing the same problem...Can anybody share G920A NV data file??

Waiting ADB device... OK
Reading phone info...
Model: SAMSUNG-SM-G920A
Android version: 6.0.1
Product code: 
Phone version: 
PDA version: G920AUCS4CPG1
CSC version: G920AATT4CPG1
CSC country code: USA
CSC sales code: ATT
HW version: 
Phone SN: 
Chip name: EXYNOS7420
Modem board: 
Security patch: 2016-07-01
RF cal date: 
IMEI: 
Checking Super user right... true
Reading NV data... OK
Checking NV data... error
Security damaged (1)
Done with Samsung Tool PRO v.29.0