SM-G920T Security damaged

[GSMTOPSUD]

how to repair security damaged G920T

Waiting ADB device... OK
Reading phone info...
Model: SM-G920T
Android version: 7.0
Product code: 
Phone version: G920TUVU5FQG3
PDA version: G920TUVU5FQG3
CSC version: G920TTMB5FQG3
CSC country code: USA
CSC sales code: TMB
HW version: 
Phone SN: R58GC1M1Y4L
Chip name: EXYNOS7420
Modem board: SHANNON333
Security patch: 2017-07-01
RF cal date: 
IMEI: 350000000000006
Checking Super user right... true
Reading NV data... OK
Checking NV data... error
Security damaged (1)

Done with Samsung Tool PRO v.29.5

[Asad ali khan]

write nv data from z3x backup then again try to perform operation

[GSMTOPSUD]

Originally Posted by Asad ali khan

write nv data from z3x then again try to perform operation

same problem after backup nv

[midou01]

just write this nv data file then repair imei or write cert file. I hope that this file will help many people here because no one have shared nv data for g920t in this forum.

[.:bono:.]

Originally Posted by midou01

just write this nv data file then repair imei or write cert file. I hope that this file will help many people here because no one have shared nv data for g920t in this forum.

thank you brother, your nv file helped.

[maliro2012]

I can't fix using this methods can you help please

[amranprince]

Write Nv Data With Z3x Box ........

[Novardo]

Thank you very much this method works for me SM-G920T

[namos23]

Originally Posted by midou01

just write this nv data file then repair imei or write cert file. I hope that this file will help many people here because no one have shared nv data for g920t in this forum.

I have tried, but then get this error:

Operation: Write CERT
Selected model: SM-G920T
Software version: 31.0

Waiting ADB device... OK
Reading phone info...
Model: SM-G920T
Android version: 7.0
Product code:
Phone version: G920TUVS6FRA3
PDA version: G920TUVS6FRA3
CSC version: G920TTMB6FRA3
CSC country code: USA
CSC sales code: TMB
HW version:
Phone SN:
Chip name: EXYNOS7420
Modem board: SHANNON333
Security patch: 2018-01-01
RF cal date:
IMEI: 350000000000006
Checking Super user right... true
Reading NV data... OK
Checking NV data... OK
Initialization zTool... OK
Running zTool, please wait... OK
HWID: 88 68 7A 0E D6 06 00 00 00 00 00 00 00 00 00 00
Calculating... error
Security damaged (hmac mismatch)
Done with Samsung Tool PRO v.31.0

[amleto90]

Originally Posted by namos23

I have tried, but then get this error:

Operation: Write CERT
Selected model: SM-G920T
Software version: 31.0

Waiting ADB device... OK
Reading phone info...
Model: SM-G920T
Android version: 7.0
Product code:
Phone version: G920TUVS6FRA3
PDA version: G920TUVS6FRA3
CSC version: G920TTMB6FRA3
CSC country code: USA
CSC sales code: TMB
HW version:
Phone SN:
Chip name: EXYNOS7420
Modem board: SHANNON333
Security patch: 2018-01-01
RF cal date:
IMEI: 350000000000006
Checking Super user right... true
Reading NV data... OK
Checking NV data... OK
Initialization zTool... OK
Running zTool, please wait... OK
HWID: 88 68 7A 0E D6 06 00 00 00 00 00 00 00 00 00 00
Calculating... error
Security damaged (hmac mismatch)
Done with Samsung Tool PRO v.31.0

Hello, besides the problem of security damaged if you have already written the data NV file, there is also the problem is also the latest firmware of Android 7 with the security patch of January 2018, does not write the IMEI and the patch cert or write certificate, you should try to do the downgrade of firmware Android 7 's are at an older security patch level ever since the revision binary 6 that you have installed on your phone allows you to downgrade to the Android 7 version with security patch level with revision binary 6

[namos23]

Originally Posted by amleto90

Hello, besides the problem of security damaged if you have already written the data NV file, there is also the problem is also the latest firmware of Android 7 with the security patch of January 2018, does not write the IMEI and the patch cert or write certificate, you should try to do the downgrade of firmware Android 7 's are at an older security patch level ever since the revision binary 6 that you have installed on your phone allows you to downgrade to the Android 7 version with security patch level with revision binary 6

And which version do you recommend that I downgrade to, given the current version on the phone?

[amleto90]

Originally Posted by namos23

And which version do you recommend that I downgrade to, given the current version on the phone?

The problem is that having the binary 6 firmware that you have installed in the phone there is no 'possibility to downgrade because all versions of android 7 with older security patches have the binary 5 and does not allow you to downgrade of the firmware on the model g920t if you go to see on sammobile the firmware versions of android 7 with older security patch level have the binary 5 you could try to install a firmware combination to downgrade to the android version 7 with binary 5 but it is risky and it can damage the phone unfortunately with the latest updates samsung has closed the ability to write the certificate for that even writing the nv file and then trying to write the certificate or using the patch cert is not successful

[namos23]

Originally Posted by amleto90

The problem is that having the binary 6 firmware that you have installed in the phone there is no 'possibility to downgrade because all versions of android 7 with older security patches have the binary 5 and does not allow you to downgrade of the firmware on the model g920t if you go to see on sammobile the firmware versions of android 7 with older security patch level have the binary 5 you could try to install a firmware combination to downgrade to the android version 7 with binary 5 but it is risky and it can damage the phone unfortunately with the latest updates samsung has closed the ability to write the certificate for that even writing the nv file and then trying to write the certificate or using the patch cert is not successful

So then why would you tell me to downgrade if downgrading is not possible??

[amleto90]

Originally Posted by namos23

So then why would you tell me to downgrade if downgrading is not possible??

To write the certificate you have no alternative you need to downgrade even for the issue of writing the file nv data having samsung closed the possibility of this operation in the security of the latest security patches I wrote you in the first post to downgrade if there were firmware with binary 6 having a sammobile guard on there is only the binary 5 for downgrading you can try to install a firmware combination and flash in 4 files of the stock firmware with older security patches but it is risky otherwise you have to wait that the z3x team comes up with an update for the new security for writing the cert and the patch cert

[namos23]

Originally Posted by amleto90

To write the certificate you have no alternative you need to downgrade even for the issue of writing the file nv data having samsung closed the possibility of this operation in the security of the latest security patches I wrote you in the first post to downgrade if there were firmware with binary 6 having a sammobile guard on there is only the binary 5 for downgrading you can try to install a firmware combination and flash in 4 files of the stock firmware with older security patches but it is risky otherwise you have to wait that the z3x team comes up with an update for the new security for writing the cert and the patch cert

I don't think you have any idea what you're talking about.

NV Data and cert write function perfectly fine on binary 6. My original post was to show that after writing the nv data file that was posted by someone earlier, there is now a new error that I'm trying to fix