It is extremely convenient in developing and often massivly underbanked countries. Many people don't have - or are not even able to open - bank accounts and tra

It is extremely convenient in developing and often massivly underbanked countries. Many people don't have - or are not even able to open - bank accounts and transferring money (for example by handing it to a bus driver) was fraught with risk and pretty inconvenient. Safaricom introduced a massively successful scheme, called M-PESA, in Kenia and plans to expand it (http://en.wikipedia.org/wiki/M-PESA http://en.wikipedia.org/wiki/M-PESA). The Economist has an interesting article on how it works and the benefits it provides to developing countries. (http://www.economist.com/node/16319635 http://www.economist.com/node/16319635). Implementing something like this in a developed country doesn't seem to make a whole lot of sense. And the implementation with the 15 minute self expiring code) sounds tedious at best.