While the project seems to have neat goals the: "unlimited 4G / LTE wifi data and a mobile hotspot from Sprint", is meh for $500. Consider this: Buy a unlocke

While the project seems to have neat goals the: "unlimited 4G / LTE wifi data and a mobile hotspot from Sprint", is meh for $500. Consider this: Buy a unlocked Fi moto X4 from best buy for like $200, do the Sprint BYOD deal with a Google Voice number ($3 to unlock number for porting), this will give you $4/mo 'unlimited' service for a year. Slickdeals has a long in-depth thread on the full details of this arrangement.