Dev sends Bitcoin without using the web or the power grid

One day we might all be able to send Bitcoin from literally anywhere in the world, with no electricity and no internet connection. Off-grid cryptocurrency transactions seem to be becoming an achievable possibility as yet another developer has managed to send Bitcoin without a data connection, using low-cost consumer grade hardware. An ingenious developer from New Zealand managed to send the transaction over 12 km away using four goTennas and a $30 Android smartphone. Over the weekend I sent a b