I Wana know

Boox Palma. Not a phone as it has no SIM card which I prefer. Can't flash graphene on it but I don't use it for anything sensitive. I just use when outside for a couple of specific tasks and of course plenty of trading content

Also like Derek states, you don't really want to be using these devices as a daily driver due to then running older android versions which can be an attack vector. A secure WiFi connection then run obtanium on for some foss apps without login credentials, a decent browser and Nostr client with npub watch only login in my opinion is ok. But depends obviously on threat model.