Smartphone as bank account

In 2012 I made a presentation at our local security conference (South Florida ISSA Chapter) on smartphone security.  Part of what I presented was the trends I was seeing at the time, based on reports.  Some most people are aware of:  smartphones overtaking "feature phones", smartphones overtaking laptop/PCs in sales, etc.

Another trend I point out I think is not so well known, at least here in the "developed world".  That of smartphones becoming the first, maybe only computing device of people in the "developing world", but of also becoming for them the equivalent of a credit card or bank account (checking account).