In my experience (ghost user) downgrade a modem works till "new" OTA (not that you used before) after that... you will have a beatiful paperweight :laugh:
excuse my poor english... I'm latino!
excuse my poor english... I'm latino!
The baseband loads after every wipe from the /fsg Partition. So if you don't delete your efs Partition there is no big risk.
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Hello,
Sorry for my bad English. I am writing with the google translator.
I had android 7 on my phone and wanted to go back to android 6.
if I use the script, I always have the following errors.
C:\mfastboot flash partition gpt.bin
target max-sparse-size: 256MB
sending 'partition' (45 KB)...
OKAY [ 0.000s]
writing 'partition'...
(bootloader) Validating 'gpt.default.xml'
(bootloader) Security version downgrade
(bootloader) Image primary_gpt failed validation
(bootloader) Preflash validation failed
(bootloader) Cancelling 'gpt.default.xml'
FAILED (remote failure)
finished. total time: 0.078s
And in the following:
C:\mfastboot flash boot boot.img
target max-sparse-size: 256MB
sending 'boot' (16384 KB)...
OKAY [ 0.593s]
writing 'boot'...
(bootloader) Image not signed or corrupt
OKAY [ 0.296s]
finished. total time: 0.889s
C:\mfastboot flash recovery recovery.img
target max-sparse-size: 256MB
sending 'recovery' (16484 KB)...
OKAY [ 0.593s]
writing 'recovery'...
(bootloader) Image not signed or corrupt
OKAY [ 0.312s]
finished. total time: 0.905s
Can someone tell me what it has to mean.
Thanks for the help.
Sorry for my bad English. I am writing with the google translator.
I had android 7 on my phone and wanted to go back to android 6.
if I use the script, I always have the following errors.
C:\mfastboot flash partition gpt.bin
target max-sparse-size: 256MB
sending 'partition' (45 KB)...
OKAY [ 0.000s]
writing 'partition'...
(bootloader) Validating 'gpt.default.xml'
(bootloader) Security version downgrade
(bootloader) Image primary_gpt failed validation
(bootloader) Preflash validation failed
(bootloader) Cancelling 'gpt.default.xml'
FAILED (remote failure)
finished. total time: 0.078s
And in the following:
C:\mfastboot flash boot boot.img
target max-sparse-size: 256MB
sending 'boot' (16384 KB)...
OKAY [ 0.593s]
writing 'boot'...
(bootloader) Image not signed or corrupt
OKAY [ 0.296s]
finished. total time: 0.889s
C:\mfastboot flash recovery recovery.img
target max-sparse-size: 256MB
sending 'recovery' (16484 KB)...
OKAY [ 0.593s]
writing 'recovery'...
(bootloader) Image not signed or corrupt
OKAY [ 0.312s]
finished. total time: 0.905s
Can someone tell me what it has to mean.
Thanks for the help.
Last edited:
Can I down grade without changing bootloader but flash a backup back to Android N if desired?
1- To perform a downgrade, you should ignore gpt.bin and bootloader.img flash commands
2- All available firmware images of moto Z play are not signed. I think that means that are not certified by motorola.
Hi Morph, does your script work with dual sim models too?
Normally it should work also with the dualsim devices. But I haven't test it, i don't own a nativ dualsim.
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Got a ton of error messages while flashing, but ultimately it worked alright. OTAs working fine as well, thank you very much for this
Error Message from the Script
Hello,
i try to use the "DOWNGRADE FIRMWARE.bat" but i get the error that the command "mfastboot" is either wrong or cant be found.
See attached file.
Unzip your script and the firmware in the same folder.
Mfastboot.exe is also availble.
Hello,
i try to use the "DOWNGRADE FIRMWARE.bat" but i get the error that the command "mfastboot" is either wrong or cant be found.
See attached file.
Unzip your script and the firmware in the same folder.
Mfastboot.exe is also availble.
Attachments
It is my understanding as long as I do not flash bootloader or modem, I can flash back to MM. Then now that I have a stock N rom, I can flash back to N, not flashing bootloader or modem. Is that correct?
Risk IMEI Lost
This comands I undertand Lost IMEI, is true?
fastboot flash modem NON-HLOS.bin
fastboot erase modemst1
fastboot erase modemst2
fastboot flash fsg fsg.mbn
This comands I undertand Lost IMEI, is true?
fastboot flash modem NON-HLOS.bin
fastboot erase modemst1
fastboot erase modemst2
fastboot flash fsg fsg.mbn
=MoRpH= I tested the downgrade script yesterday. It does his job, but after that there are no OTA's possible because of the missing modem downgrade.
I fixed it for a fully downgrade:
https://drive.google.com/file/d/0B134drJ4-Ed0MHQ5aE1wUmp5eFk/view?usp=drivesdk
Use that file only with a unlocked Bootloader!!!!!
I use your script to downgrade and I worked very well, the detail is that I read a lot that if we flash the following commands, we will lose the IMEI of the device, you can tell me if it has to be a result of how we flash the flashing position
Thank you very much for your time and help by sharing your work.
I fixed it for a fully downgrade:
https://drive.google.com/file/d/0B134drJ4-Ed0MHQ5aE1wUmp5eFk/view?usp=drivesdk
Use that file only with a unlocked Bootloader!!!!!
I use your script to downgrade and I worked very well, the detail is that I read a lot that if we flash the following commands, we will lose the IMEI of the device, you can tell me if it has to be a result of how we flash the flashing position
Thank you very much for your time and help by sharing your work.
I did try on Moto Z with LineageOS 14.1 but got boot loop, anything else I can do?
But I can flash again LineageOS 14.1 and works, but can't flash to MM
But I can flash again LineageOS 14.1 and works, but can't flash to MM
a question, system without changes only unlock the bootloader to downgrade 7 to 6 but replace version and without problems i thank you your answers, use all the commands until the recommended not to use not to lose the imei and of fact volvi nougat but with other updates: The detail is want to use the version retapac of 6.0.1 stock but when it is updated over normal, can i follow your script used without asking the imei and nothing true? I have not done any stupid and i did not have any root, my pretension is receiving ota updates
No OTA's ever?
I've actually downgraded with the O.P's method. I'm not getting any notifications for the nougat update (which I dont mind). However will this stop me from getting any of the newer updates? or patches for nougat? Basically I just want to know that my phone wont get bricked.
I've actually downgraded with the O.P's method. I'm not getting any notifications for the nougat update (which I dont mind). However will this stop me from getting any of the newer updates? or patches for nougat? Basically I just want to know that my phone wont get bricked.
I've downgraded to Marshmallow a month ago at least, and I've gotten the Nougat OTA + March 2017 Security Patch OTA through my carrier.I've actually downgraded with the O.P's method. I'm not getting any notifications for the nougat update (which I dont mind). However will this stop me from getting any of the newer updates? or patches for nougat? Basically I just want to know that my phone wont get bricked.
Hello you dropped from nougat to Mm and you received the otas and there were no problems? Thank you
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