While there has been on and off speculation over Facebook developing smartphone hardware, Ikeepcomingback to the fact that other than Apple and its iPhone offering, smartphone hardware offers margins that are well below that for software and Internet companies.
In trying to wrap my head around the Karma hotspot a new prepaid 4G mobile hotspot service that relies on a novel model I keepcomingback to the (often post-Apocalyptic) sci-fi stories where some other commodity or service has supplanted cash or gold as the chief currency.
As for getting non- geo-promiscuous customers to keepcomingback, I guess businesses will have to keep up the ole put-your-business-card-in-the-fish-bowl-to-win-free-stuff trick.