sm-g900f 5.0 unlock pls help

[dominica]

sm-g900f 5.0 unlock pls help

[AC-GSM971]

Originally Posted by dominica

sm-g900f 5.0 unlock pls help

unlock via cert method BUT MAY NOT WORK ON 5.0 ...... GIVE A TRY......BACKUP ALL DATA ....IF IT DOSENT WORK ATLEST YOU CAN GO TO INITIAL CONDITION

1) root
2) bacup data (efs nvm qcn and cert and keep it safe)
3) wipe securty
4) write cert
5) write qcn


note - backup qcn, efs, nvm, security, and certs before proceding with unlock

regards
acgsm

[Octopus box]

Hello.

Downgrade the phone to 4.4.2 and do the next:
1. Root the phone.
2. Perform "Wipe Security".
3. Perform "Write Cert".

Also, You can try to do the next:
1. Check whether "Enable cp logging" option available in Recovery Mode and activate it.
If option is not available - reflash the phone with Android 5.0 firmware from the Support Area.
2. Wipe phone's Security as it is described in this video: https://www.youtube.com/watch?v=1DtPT2MmNhg
3. Perform "Write Cert" operation.

[iowahawk]

Has octopus team figured out how to write cert via USB on 5.0 phones yet since now we can enable dm mode? Every 5.0 phone I try to write cert to via USB it just reads some of the phones info and just stops working.

[Octopus box]

Currently it is not possible to write Cert file via USB, because it requires root. Current root solutions using old Recovery, which don't have option, that enables Diagnostic port.

[rai14]

possible 5.0 to Downgrade the phone to 4.4.2

[Octopus box]

Yes, it is possible to downgrade SM-G900F from Android 5.0 to Android 4.4.2.

[iowahawk]

Originally Posted by Octopus box

Currently it is not possible to write Cert file via USB, because it requires root. Current root solutions using old Recovery, which don't have option, that enables Diagnostic port.

After you root the phone with cf auto you just flash the 5.0 recovery back then enable dm mode. so now its still on 5.0 rooted and dm mode enabled. the problem is not root or dm mode. the problem is writing the cert via usb.

[zishhaider]

It will be easy for product supporter and for us too who want to help you if you post logs and screen shot too.. as it will provide a clear picture...

[iowahawk]

As you can see after it reads the SW version the software just stops.

[Octopus box]

Currently there is no stable solution for phones on Android 5.x . When we will find a solution it will be added.

[iowahawk]

Do you think it has to do something with the AT. Because there is no issue wiping the efs with octopus just a problem writing cert. And I know octopus is wiping the efs correctly because i can write the cert via UART with no issues after wiping efs with octopus.

And thanks for cleaning up the garbage.

[dominica]

Originally Posted by Octopus box

Yes, it is possible to downgrade SM-G900F from Android 5.0 to Android 4.4.2.

can pls give de procedure
i flash 4.4.2 but phone did not work

[Octopus box]

@ dominica

What do You mean under "phone did not work"? What is the problem exactly? Also, please post here full Software log with Write Firmware procedure and with all of your other actions.

[rai14]

downgrade+unlock ok

thanx octopus