From my experience, it is SOLELY the underlying Android OS (version 12 and up) that makes the echo and display tint/banding issues go away. Binaries don’t seem to have any connection with it. No matter what version of binaries one uses, if the base Android OS is version 11 recommended by Jolla, echo and tint/banding still appear. Flashing Android 12 or 13, even with the old Android 11 v9a binaries, makes those issues disappear. So the fix must be in the base OS, not in the binary blobs.
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