How To Unpack, Modify, Pack And Flash `system.img.ext4` File Using Odin?

I have a system.img.ext4.lz4 file that is compatible with my Samsung S10 5G(Qualcomm) device. I have extracted system.img.ext4 file from the system.img.ext4.lz4 using unlz4 system.

Solution 1:

You cannot resolve this error. It's simple why. It's a modified .IMG file. Since you have a Qualcomm Snapdragon, you are not allowed to flash custom/modified software onto your phone. Reason being is because it's bootloader is locked. There is no way for you to unlock it. The reason the one called AP.IMG worked, is because it wasn't modified at all.