What would a disruptor in the smartphone space even do in 2025?

It's not like the status quo phones are too expensive, too small or too slow compared to the average user's use case. There is a phone for every price point, and at worst you'll be stuck with a bad camera or a laggy chipset.

There are already phones running Linux and de-Googled OSes (Purism, Librem, LineageOS). They won't ever get big enough to challenge Apple/Samsung, but maybe be big enough to have a stable enough OS to not scare off people looking to switch.