Apparently, mobiles are increasingly strategic for Africa. In an article by Ugandan evangelist Kato Miguel,

http://www.yesumulungi.com/index.php/commentaries/400-technology-rising-middle-class-and-the-future-of-evangelism-in-africa.html

There you’ll find two short videos, one by a mission strategist on the challenge for ministry:

http://www.internetevangelismday.com/mobile-outreach.php

Long documentary on the use of mobiles in Africa:

http://vimeo.com/4664795

(Thanks Tony!)