Installing fastboot rom on Redmi note 9(merlin)

[Manjotbenipal]

Hi everyone, I am thinking to downgrade from MIUI12.5.5 to 12.0.1 and both are android 11 based.
1.Will xiaomi anti-rollback policy bother me ?
2.Should I erase some lines of code from flash_all.batch file which are used to verify the version of OS?
CAN SOMEONE GUIDE ME

 

[NOSS8]

Hi everyone, I am thinking to downgrade from MIUI12.5.5 to 12.0.1 and both are android 11 based.
1.Will xiaomi anti-rollback policy bother me ?
2.Should I erase some lines of code from flash_all.batch file which are used to verify the version of OS?
CAN SOMEONE GUIDE ME

Start by:https://forum.xda-developers.com/t/flash-tool-guide-use-xiaomi-flash-tool.4262425/
If error delete the error lines from script.

 

[Manjotbenipal]

Start by:https://forum.xda-developers.com/t/flash-tool-guide-use-xiaomi-flash-tool.4262425/
If error delete the error lines from script.

Will my device be bricked of it gave me a rollback error?
And will there be no issue if the ARB ver img files and current version of my device are equal?

 

[NOSS8]

Will my device be bricked of it gave me a rollback error?
And will there be no issue if the ARB ver img files and current version of my device are equal?

both no.just flash will not work.

 

[Manjotbenipal]

Ohk thanks budd.

 

[Manjotbenipal]

both no.just flash will not work.

Btw how can I use miflash to flash an mtk device. I came to know that miflash only works with snapdragon devices.

 

[NOSS8]

Btw how can I use miflash to flash an mtk device. I came to know that miflash only works with snapdragon devices.

Miflash works with Mediatek:

but you can try​

https://c.mi.com/thread-2243844-1-0.html
https://miaccountguide.com/download-mi-sp-flash-tool/

 

[Manjotbenipal]

But if you select mtk in the chip tab then it will open spflash tool.
So the conclusion is that there is no option but to use spflash tool

Miflash works with Mediatek:

View attachment 5643145

but you can try​

https://c.mi.com/thread-2243844-1-0.html
https://miaccountguide.com/download-mi-sp-flash-tool/

 

[NOSS8]

But if you select mtk in the chip tab then it will open spflash tool.
So the conclusion is that there is no option but to use spflash tool

"I came to know that miflash only works with snapdragon devices"
and on You tube?
Open Miflash and select the chip that all,is it clear?

 

[Manjotbenipal]

"I came to know that miflash only works with snapdragon devices"
and on You tube?
Open Miflash and select the chip that all,is it clear?

this is with qualcolm selected

this is when mtk is selected

so will it still work in fastboot mode or i will have to enter edl mode and bypass the edl auth to downgrade from 12.5.5 to 12.0.2
thanks in advance if you can help

 

[NOSS8]

so will it still work in fastboot mode or i will have to enter edl mode and bypass the edl auth to downgrade from 12.5.5 to 12.0.2
thanks in advance if you can help

Bootloader unlocked?(forgot but in my first post link)
Just fastboot mode.

 

[Manjotbenipal]

Bootloader unlocked?(forgot but in my first post link)
Just fastboot mode.

Yes. Bootloader is unlocked.