Currently don't have a smartphone, using a CatB40 but the company that was licensed to produce them no longer exists. Have been starting to wonder what to replace it with as I don't really care for Android and there are not really many options left.
Probably leaning towards cheap second hand, SIM that is calls/SMS only so data is never enabled. Download local maps using osmAnd then limit it to LAN only so it can access my rygel media server with VLC. Now I wonder if steam link works if you are LAN only, I think so? Can always play Dwarf Fortress and CDDA over SSH instead though.