It's not the fastest solution, but the best answer for me almost always comes from spending an hour or so on the xda developers forum for whatever model phone I'm looking at.
post
https://wiki.lineageos.org/devices/#samsung
DivestOS isn't around anymore, GrapheneOS won't work on it, and I think Calyx is still out of the game so that leaves Lineage as your best option. Maybe Kali
So, CalyxOS is currently attempting an AOSP 16 update but the AOSP 17 update is releasing and it is already out of date, so NOT THAT.
GrapheneOS is more up to date but only supports Pixel phones AFAIK.
Linux is going to be your best bet. PostmarketOS supports 735 devices but alas it might(?) not support the a35 as only the a3, a30, a32, and a40 are listed from what I saw.
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Samsung's are generally the least modifiable.
The last Samsung I was able to do much with was the S4.
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Beware, if your device is the Verizon version then the answer is that most likely there is absolutely nothing you can do. Never buy the Verizon version because they lock them down and throw away the key
search ur device on xda forums
if you can unlock it, you can always install a treble gsi rom even if there's no rom developed specifically for your device
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