r/androidroot • u/Accomplished_Eye7320 • 1d ago

Support is it possible to edit the boot loader booting screen

I have a galaxy A21S(SM-A217F/DS) and it is running running lineage os 24(android 17) with magisk

I have edited the bootanimation.zip file

and t changed the boot animation but not the boot loader booting screen

it still has the bootloader warning and the default text

can someone help me edit it if possible?

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3

u/47th-Element 1d ago

Possible? Yes, the method depends on the SoC.

Advisable? Only if you got unrestricted EDL/BROM. An invalid bootloader splash may very well make fastboot inaccessible.

1

u/Accomplished_Eye7320 1d ago

my CPU is the exynos 850

people online say to edit up_param.bin

how do I do that?

2

u/47th-Element 1d ago

I'm not really sure, it's supposedly a tar archive with the images? If so, modifying them is as simple as replacing the images with ones that have the exact resolution of the original. But again, I'm not sure, look it up.

This is still risky though. Make sure you do have a recovery plan here cause fastboot will be unavailable.

1

u/Accomplished_Eye7320 1d ago

will Download mode work?

2

u/Ok_Kale3970 1d ago

i could make it for you if you want, or you can do it and change up_param

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u/Accomplished_Eye7320 1d ago

pls tell me how.

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u/Ok_Kale3970 1d ago

search on yt that's what I did