i have a pixel 6 verizon and need to downgrade the firmware to android 13 october 2022. The only way to do that is via OTA image flash but whenever i try it does not flash since it cannot downgrade bootloader. the phone cannot be oem unlocked. my only chance is to edit/remove boot.img and/or modify the script to prevent the bootloader flash. i've found payload file dumpers but only to extract the images within. is there any way to do this? i know it can be don for the full system images rather easy.
Question OTA image Payload edit to disble bootloader flash posible?
- Thread starter ronclone
- Start date
are you looking for a way to edit the extracted images?
If so I think you might be able to edit the extracted boot images with a text editor although not sure how reliable my information is for that
yes, i would like to edit the image to skip flashing the bootloader. however, OTA images are different than full factory images. they do not have an easy way to modify a "flash-all.bat" file or equivalent. therefore my question, i would like to know if something like this is posible at all.
The bootloader has to be unlocked to manually flash a factory image or OTA. Since you have a Verizon device you cannot unlock your bootloader, so attempting to flash any image of any kind will fail. Worse, even if you did have an unlocked device, without a custom recovery you won't be able to flash modified factory images. The stock recovery checks for the presence of Google's signature in the factory image and, if it doesn't find it, will refuse to flash the package.
Modifying flash-all.bat to not flash the bootloader by commenting out the proper line in the batch file will work since you're not modifying the images themselves, but the point is moot anyway since you cannot manually flash factory images due to that pesky bootloader.
I stand corrected regarding the flashing of OTA update files. Flashing full OTA images is conceivably possible, considering that I forgot Google gave device owners that capability. However, this doesn't change the fact you cannot alter Google-supplied ROM images without losing Google's signature on those files. So you won't be able to flash an OTA without also flashing the bootloader.
So is there a specific reason you have to have that particular bootloader?
So is there a specific reason you have to have that particular bootloader?
shoey63
Recognized Contributor
Your on a device with an unlockable bootloader.
You can only flash official ota zips in recovery provided you are not downgrading.
Any attempt to manipulate the OTA zip will break the Google signature, and therefore any attempt to flash it on a locked bootloader will fail.
Tldr: forget about it
You can only flash official ota zips in recovery provided you are not downgrading.
Any attempt to manipulate the OTA zip will break the Google signature, and therefore any attempt to flash it on a locked bootloader will fail.
Tldr: forget about it
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2Your on a device with an unlockable bootloader.
You can only flash official ota zips in recovery provided you are not downgrading.
Any attempt to manipulate the OTA zip will break the Google signature, and therefore any attempt to flash it on a locked bootloader will fail.
Tldr: forget about it1
yes, i would like to edit the image to skip flashing the bootloader. however, OTA images are different than full factory images. they do not have an easy way to modify a "flash-all.bat" file or equivalent. therefore my question, i would like to know if something like this is posible at all.
