I hate to be "that guy", but why do you insist on a phone? I used to have an EeePC back before decent mobile hotspot plans were affordable, I'd love to just us

I hate to be "that guy", but why do you insist on a phone? I used to have an EeePC back before decent mobile hotspot plans were affordable, I'd love to just use a dumbphone as a hotspot and do most of my computing on a small linux computer, but most of the flip phones I've found use 2G (yikes!)