Hey, just stumbled upon this too, Android4Lumia, and 520 is one of the supported devices: https://android4lumia.github.io/downloads.html

Some years ago, mentioning Linux for daily non-gaming use:

Guy: “Installing Linux is complicated though”

Me: “It wasn’t bad 10 years ago, and now it’s as hard as clicking Next a few times, even faster than Windows”

Guy: “Well duh, you have ten years of experience installing it!”

Difficult to argue with this non-logic.

Looks like it is partially supported: https://wiki.postmarketos.org/wiki/Nokia_Lumia_520_(nokia-fame)

I have a Lumia 635 and got tmpfs to start, but then I am lost at “locate your ramdisk” https://wiki.postmarketos.org/wiki/Nokia_Lumia_630_(nokia-moneypenny)