G925F - Write Cert error... still no solution ?

[chrisek05]

Hello,

I would like to ask what about Write Cert into G925F with 4 security level ? I'm observing the forum for about 2-3 months and Z3X dont have solution ? Maybe someone could tell me how may I write cert ?

Operation: Write CERT
Selected model: SM-G925F
Software version: 27.1

Waiting ADB device... ok
Reading phone info...
Model: SM-G925F
Android version: 6.0.1
Product code: SM2G925FZDAPHN
Phone version: G925FXXU4DPG5
PDA version: G925FXXU4DPGU
CSC version: G925FDDX4DPG1
CSC country code: Germany
CSC sales code: DDE
HW version: MP 0.710
Phone SN: RF8H11FXXLA
Chip name: EXYNOS7420
Modem board: SHANNON333
RF cal date: 20160119
IMEI:
Checking Super user right... true
Initialization zTool... ok
Running zTool, please wait...
Start... ok
Initialization... ok
Generate and check client proof... ok
Verify proof by client... ok
Reading data... error (8)
Done with Samsung Tool PRO v.27.1

[NKhan_Gsm]

first downgrade to 5.1.1 than try to write cert after rooting.

[chrisek05]

I can't downgrade to 5.1.1 because of security level 4... Unless you a have a solution ?

[Z3X]

Now we don't have solution, problem under research.

[NKhan_Gsm]

Originally Posted by Z3X

Now we don't have solution, problem under research.

Sir I have repaired many S6 and S6 Edge DRK but 2 case I couldn't so it might also have been because of security level ? If so how we can know the security level before wasting time on higher security level phone ?


WBR

[xerraco]

This is how to know if New Security "4DPG5", usually Error 8,9,0 also means New Security.


Br,
xerraco

[chrisek05]

Z3X - I would like to ask you about the process of research of new security?

[oggi21]

Originally Posted by NKhan_Gsm

Sir I have repaired many S6 and S6 Edge DRK but 2 case I couldn't so it might also have been because of security level ? If so how we can know the security level before wasting time on higher security level phone ?


WBR

DRK fix is working fine for new 4bit security. You can fix it with box or just flash cf-auto-root. Problem starts when you try write/patch cert or repair IMEI. Also downgrading it's not possible so for now we stuck with this problem.

[oggi21]

Originally Posted by Z3X

Now we don't have solution, problem under research.

Thank You for andser 'couse I try to finduot something for long time without any respond.

[NKhan_Gsm]

Originally Posted by oggi21

DRK fix is working fine for new 4bit security. You can fix it with box or just flash cf-auto-root. Problem starts when you try write/patch cert or repair IMEI. Also downgrading it's not possible so for now we stuck with this problem.

Mate even if a phone boot normally with a damaged DRK it will hang during using and also it will show damaged DRK in recovery mode .


WBR

[loniryan]

FLASH ONLY MODEM.BIN FROM XXU4 VERSION COMBINATION FIRMWARE..THAN WRITE CERT VIA UART.
br

[oggi21]

Originally Posted by NKhan_Gsm

Mate even if a phone boot normally with a damaged DRK it will hang during using and also it will show damaged DRK in recovery mode .

WBR

After DRK fix with z3x box on 4bit security it shows z3x recovery but when you reflash same rom once again with odin (and PIT file) all working good. You have no sind of DRK issue. I tested on sm-g925f with G925FXXU4DPJH