Your correct on mobile phones in Africa. This suprise growth which shocked the industry has caught the attention of a NY Times journalist showing that Africans can make money off the growing phenomenon.
Bekowe Skhakhane of South Africa uses her cellphone to talk to her husband, who works in a steel factory 250 miles away.
and

Ester Nkwanyana charges her neighbors' cellphones for a small fee using a car battery. Africa's cellphone boom has taken the industry by surprise.

I think it good for it lets many types of folks old and young participate using technology to strengthen communication. Also impress with finding new uses for common things such as car batteries and such.
Here is the full slideshow url
http://www.nytimes.com/slideshow/200...IDESHOW_1.html