[mhashim]

Whats interesting about the model of selling minutes is that it is now used almost as a currency in some countries (specifically in african countries) where a cab driver will accept a transfer of minutes rather than money because he knows he can resell those minutes to someone else.

[felipe]

Exactly. Actually the site nextbillion.net did a case study a few years ago about this subject. I cannot find the exact link right now, but I am sure it's somewhere in the site :)