Thread: Firmware downgrade from 1.3 to 1.2 possible
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dredlok706 is offline dredlok706
2022-04-21 , 06:37
Posts: 252 | Thanked: 282 times | Joined on Oct 2021 @ Poland
#82
Well, I did it
I downgraded PR 1.3 to PR 1.0
Generally, I used cert with PR 1.0 version. Then, I flashed PR 1.0:
Code:
sudo flasher -F DFL61_HARMATTAN_10.2011.34-1_PR_LEGACY_001-OEM1-958_ARM.bin -F mmc.bin -f --erase-user-data=secure --erase-mmc=secure
It failed at cmt-mcusw:
Code:
bb5_rdc_cert_read failed
bb5_rdc_cert_read failed
bb5_rdc_cert_read failed
bb5_rdc_cert_read failed
bb5_rdc_cert_read failed
bb5_rdc_cert_read failed
MTC_NOS_READY not received
MTC_NOS_READY not received
MTC_NOS_READY not received
CMT RFS failed
[Pipe   7] Finishing in error state with status 1
So I flashed CMT from PR 1.3:
Code:
sudo flasher -F pr1.3fw001.bin --flash-only=cmt -f -R
Now everything works Check screenshots



So, finally, I can confirm, downgrade is possible
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