Well, I unfortunately don’t know how to solder, and I’ve found that FreshTomato works on my router (even with the latest version).

Thanks! Installed FreshTomato and so far it’s working fine!

Well, I’d say 2 GB of RAM is actually quite plenty for a router since it doesn’t need to do anything that RAM intensive. Even a desktop computer running Linux with no GUI only uses around 100 MB of RAM.

Well, they say that development for these phones is mostly dead.

Also, I do think that getting a virus by simply downloading Android ROMs from some unknown source (or an open source project maintained only by 1 person) would be quite easy. Not to mention that xz-utils, an open-source project was recently backdoor-ed.