Technically you could just use an existing 4G portable hotspot device, then pay for the mobile plan using a bitcoin debit card, or if there's enough demand, the distributor will start accepting bitcoin straight.
what do you think about like idea on wireless/wifi as like electricity/on-demand or pay as you go
and another question brings, it's still centralized structures and under surveillance with any existing infra. and always security is concern with incoming more future wireless devices and bots and I think this area still wildwest and solvable.. also goods for everyone in global if peers can share internet resources fairly, securely. probably it's more efficient for everyone for internet access and information/knowledge sharing..