GSM-Forum - View Single Post - G925T Write Cert: Unknown BaseBand / NV Data Security Error / Security Error HELPPP!!

GalaxyVibe · 03-31-2019, 15:40

SOLVED!! This is how I fixed the problem using only Z3X:

1. Root the phone with CF Auto Root (Not with the Engineering Root). keep in mind the Knox is going to be trigged to 1 warranty void: CF Auto Root for SM-G925T

2. With Z3X box in the Repair Tab, use the "Reset EFS".

Operation: Reset EFS
Selected model: SM-G925T
Software version: 35.2

Waiting ADB device... OK
Reading phone info...
Model: SM-G925T
Android version: 7.0
PDA version: G925TUVS6FRA3
CSC version: G925TTMB6FRA3
Phone version: G925TUVU6ARA1
Product code:
CSC country code: USA
CSC sales code: TMB
Phone SN:
IMEI: 350000000000006
HW version:
RF cal date:
Chip name: EXYNOS7420
Modem board: SHANNON333
Security patch: 2018-01-01
Boot Warranty bit: 1
Checking Super user right... true
Backuping EFS... OK
Reseting EFS... OK
Rebooting phone... OK

3. After the phone reboots, with Z3X go to the Backup tab and use the "Write the NV Data" (Here is the G925T NV_Data.rar).

Operation: Write NV DATA
Selected model: SM-G925T
Software version: 35.2

Waiting ADB device... OK
Reading phone info...
Model: SM-G925T
Android version: 7.0
PDA version: G925TUVS6FRA3
CSC version: G925TTMB6FRA3
Phone version: G925TUVU6ARA1
Product code:
CSC country code: USA
CSC sales code: TMB
Phone SN:
IMEI: 350000000000006
HW version:
RF cal date:
Chip name: EXYNOS7420
Modem board: SHANNON333
Security patch: 2018-01-01
Boot Warranty bit: 1
Checking Super user right... true
Writing NV Data... OK
Recalculating MD5... OK
Deleting backup... OK
Write NV Data done

4. And immediately, without powering the phone off, with Z3X go to the Repair tab and enter the IMEI number that you need to write in the phone and click "Repair" (I wrote the original IMEI of the phone that was in the back of the phone).

Operation: Repair
Selected model: SM-G925T
Software version: 35.2

Waiting ADB device... OK
Reading phone info...
Model: SM-G925T
Android version: 7.0
PDA version: G925TUVS6FRA3
CSC version: G925TTMB6FRA3
Phone version: G925TUVU6ARA1
Product code:
CSC country code: USA
CSC sales code: TMB
Phone SN:
IMEI: 350000000000006
HW version:
RF cal date:
Chip name: EXYNOS7420
Modem board: SHANNON333
Security patch: 2018-01-01
Boot Warranty bit: 1
SIM State: ABSENT
Checking Super user right... true
Reading NV data... OK
Checking NV data... OK
Initialization zTool... OK
Running zTool, please wait... OK
HWID: 88 B8 BD B7 75 05 00 00 00 00 00 00 00 00 00 00
Calculating...
hmac mismatch, this can damage phone continue? Yes OK
Repairing... OK
Writing NV data... OK
Rebooting phone... OK
Repair done

5. Then, using the Z3X, go to the unlock tab and click on "Unlock" the phone.

Operation: Unlock
Selected model: SM-G925T
Software version: 35.2

Waiting ADB device... OK
Reading phone info...
Model: SM-G925T
Android version: 7.0
PDA version: G925TUVS6FRA3
CSC version: G925TTMB6FRA3
Phone version: G925TUVU6ARA1
Product code: SM-G925TZWATMB
CSC country code: USA
CSC sales code: TMB
Phone SN:
IMEI: 35XXXXXXXXXXXXX
HW version: REV0.2
RF cal date: 20150506
Chip name: EXYNOS7420
Modem board: SHANNON333
Security patch: 2018-01-01
Boot Warranty bit: 1
SIM State: ABSENT
Checking Super user right... true
Reading NV data... OK
Checking NV data... OK
Initialization zTool... OK
Running zTool, please wait... OK
HWID: 88 B8 BD B7 75 05 00 00 00 00 00 00 00 00 00 00
Calculating... OK
Unlocking... OK
Writing NV data... OK
Rebooting phone... OK
Unlock done

6. Finally, using the Z3X, got to the Repair tab and click on "Patch Certificate".

Operation: Patch Certificate
Selected model: SM-G925T
Software version: 35.2

Waiting ADB device... OK
Reading phone info...
Model: SM-G925T
Android version: 7.0
PDA version: G925TUVS6FRA3
CSC version: G925TTMB6FRA3
Phone version: G925TUVU6ARA1
Product code: SM-G925TZWATMB
CSC country code: USA
CSC sales code: TMB
Phone SN:
IMEI: 35XXXXXXXXXXXXX
HW version: REV0.2
RF cal date: 20150506
Chip name: EXYNOS7420
Modem board: SHANNON333
Security patch: 2018-01-01
Boot Warranty bit: 1
SIM State: ABSENT
Checking Super user right... true
Initialization zTool... OK
Running zTool, please wait... OK
Reading modem... OK
Patching modem... OK
Writing modem... OK
Rebooting phone... OK
Patching CERT check... done

This is permanent solution for me. The phone worked perfectly even after resetting the phone two times. Thanks for reading!

PLEASE CLICK THANKS IF THE POST IS HELPFUL => => =>

03-31-2019, 15:40	#5 (permalink)
GalaxyVibe No Life Poster Join Date: May 2016 Posts: 1,164 Member: 2577670 Status: Offline Thanks Meter: 883	SOLVED!! This is how I fixed the problem using only Z3X: 1. Root the phone with CF Auto Root (Not with the Engineering Root). keep in mind the Knox is going to be trigged to 1 warranty void: CF Auto Root for SM-G925T 2. With Z3X box in the Repair Tab, use the "Reset EFS". Operation: Reset EFS Selected model: SM-G925T Software version: 35.2 Waiting ADB device... OK Reading phone info... Model: SM-G925T Android version: 7.0 PDA version: G925TUVS6FRA3 CSC version: G925TTMB6FRA3 Phone version: G925TUVU6ARA1 Product code: CSC country code: USA CSC sales code: TMB Phone SN: IMEI: 350000000000006 HW version: RF cal date: Chip name: EXYNOS7420 Modem board: SHANNON333 Security patch: 2018-01-01 Boot Warranty bit: 1 Checking Super user right... true Backuping EFS... OK Reseting EFS... OK Rebooting phone... OK 3. After the phone reboots, with Z3X go to the Backup tab and use the "Write the NV Data" (Here is the G925T NV_Data.rar). Operation: Write NV DATA Selected model: SM-G925T Software version: 35.2 Waiting ADB device... OK Reading phone info... Model: SM-G925T Android version: 7.0 PDA version: G925TUVS6FRA3 CSC version: G925TTMB6FRA3 Phone version: G925TUVU6ARA1 Product code: CSC country code: USA CSC sales code: TMB Phone SN: IMEI: 350000000000006 HW version: RF cal date: Chip name: EXYNOS7420 Modem board: SHANNON333 Security patch: 2018-01-01 Boot Warranty bit: 1 Checking Super user right... true Writing NV Data... OK Recalculating MD5... OK Deleting backup... OK Write NV Data done 4. And immediately, without powering the phone off, with Z3X go to the Repair tab and enter the IMEI number that you need to write in the phone and click "Repair" (I wrote the original IMEI of the phone that was in the back of the phone). Operation: Repair Selected model: SM-G925T Software version: 35.2 Waiting ADB device... OK Reading phone info... Model: SM-G925T Android version: 7.0 PDA version: G925TUVS6FRA3 CSC version: G925TTMB6FRA3 Phone version: G925TUVU6ARA1 Product code: CSC country code: USA CSC sales code: TMB Phone SN: IMEI: 350000000000006 HW version: RF cal date: Chip name: EXYNOS7420 Modem board: SHANNON333 Security patch: 2018-01-01 Boot Warranty bit: 1 SIM State: ABSENT Checking Super user right... true Reading NV data... OK Checking NV data... OK Initialization zTool... OK Running zTool, please wait... OK HWID: 88 B8 BD B7 75 05 00 00 00 00 00 00 00 00 00 00 Calculating... hmac mismatch, this can damage phone continue? Yes OK Repairing... OK Writing NV data... OK Rebooting phone... OK Repair done 5. Then, using the Z3X, go to the unlock tab and click on "Unlock" the phone. Operation: Unlock Selected model: SM-G925T Software version: 35.2 Waiting ADB device... OK Reading phone info... Model: SM-G925T Android version: 7.0 PDA version: G925TUVS6FRA3 CSC version: G925TTMB6FRA3 Phone version: G925TUVU6ARA1 Product code: SM-G925TZWATMB CSC country code: USA CSC sales code: TMB Phone SN: IMEI: 35XXXXXXXXXXXXX HW version: REV0.2 RF cal date: 20150506 Chip name: EXYNOS7420 Modem board: SHANNON333 Security patch: 2018-01-01 Boot Warranty bit: 1 SIM State: ABSENT Checking Super user right... true Reading NV data... OK Checking NV data... OK Initialization zTool... OK Running zTool, please wait... OK HWID: 88 B8 BD B7 75 05 00 00 00 00 00 00 00 00 00 00 Calculating... OK Unlocking... OK Writing NV data... OK Rebooting phone... OK Unlock done 6. Finally, using the Z3X, got to the Repair tab and click on "Patch Certificate". Operation: Patch Certificate Selected model: SM-G925T Software version: 35.2 Waiting ADB device... OK Reading phone info... Model: SM-G925T Android version: 7.0 PDA version: G925TUVS6FRA3 CSC version: G925TTMB6FRA3 Phone version: G925TUVU6ARA1 Product code: SM-G925TZWATMB CSC country code: USA CSC sales code: TMB Phone SN: IMEI: 35XXXXXXXXXXXXX HW version: REV0.2 RF cal date: 20150506 Chip name: EXYNOS7420 Modem board: SHANNON333 Security patch: 2018-01-01 Boot Warranty bit: 1 SIM State: ABSENT Checking Super user right... true Initialization zTool... OK Running zTool, please wait... OK Reading modem... OK Patching modem... OK Writing modem... OK Rebooting phone... OK Patching CERT check... done This is permanent solution for me. The phone worked perfectly even after resetting the phone two times. Thanks for reading! PLEASE CLICK THANKS IF THE POST IS HELPFUL => => =>