Well they can, but isn't debian and freebsd on mobile here now? I know they are rough around the edges, but who still cares about Android or iOS in the long run? If I can run my mobile device with root access using debian or freebsd, why still bother with Google and Apple?
Volla is one that comes to mind. Ubuntu touch, it is German, but there should be more coming. Not really advertising them, but should be more that is coming.
It doesn't even need to be something that Grandma can use. It just needs to be something that will let you pass the various "you must have a smartphone to participate in society" checks. But considering banks and the like won't even let you use AOSP in many cases, I sincerely doubt one can get a Debian phone to work.
i hear the bank argument a lot and although i can understand the importance for those without another device, i'm a little stunned people rely on modern pocket spyware to monitor their accounts. maybe i know too much, or too little, but my banking concerns are infrequent and always in a browser.
Welcome to Poland, where you can't transfer more than ~$13K daily without using mobile auth (bank app). Currently only the PKO bank implements this (and I hope this backfires on them), but I'd not be surprised if others follow.
