I think there are 3 reasonable options (that I’m pursuing currently): Linux on a phone designed for Android I’ve tried a few different models of phone. I’m currently running mobile nixos on a OnePlus 6, but waiting on Plasma Mobile to be fully functional. When I last played with it a couple months ago, the virtual keyboard was broken. Nothing else I’ve tried has had all features on the phone work. A small Linux laptop with a mobile network card I am trying to set up an MNT Pocket Reform as a phone replacement. The hardware is almost there. The software and firmware have a bit of a ways to go, but it has promise for a subset of people. A Linux-first phone-like device There are some phones that are set up with PostmarketOS or other mobile Linux distributions from the manufacturer, but they right now tend to be really pricey, under-performing, and don’t really have upstream support. The Mecha Comet seems to be another interesting option. I’ve pre-ordered one and I’m excited to see what it’s capable of.