The World Bank reports that between 2007 and 2012, Africa exceeded the number of cell phone subscribers found in the European Union and in the United States. Africa has 650 million cell phone subscribers.  At the same time, Africa has profound infrastructure gaps that the World Bank identifies as gaps able to be closed by "human capital."  Ritva Reinikka (World Bank Director for Human Development in Africa) suggests school / vocation / university buildings led by teachers and attended by students are a way to build human capital. 
By choice, force, chance or some combination, Africa has not invested in traditional schools and has invested in cell phones. Philanthropy to Africa might be more successful if it occurs over the telephone instead of (or in addition to) in traditional school buildings. Education, training and health advice are not optimally delivered exclusively by telephone. But they may be more successful than traditional schools housed in buildings where teachers are typically absent and students attend only two hours a day, where only one-quarter of teachers know how to divide one fraction by another, and where roads to arrive at a school building are often lacking. 
In October 2012 Entertainment Weekly included a free working Android smart phone in one thousand copies of their magazine.  In December 2012 a single dumb cell phones can be had for less than US$30 and a single smart phone can be had for less than US$100.  Bulk purchases are likely to make cell phones cost less. Nokia offers lessons in mathematics via cell phone.  Google offers many of their services via sms. 
Philanthropic building of roads and school buildings should not end. But here is a case of a very mobile mountain able to meet Mohammed, by way of increased taking advantage of Africa's own commitment to cell phones.
 "ICTs Delivering Home-Grown Development Solutions in Africa." The World Bank, 10 Dec. 2012. Web. 22 Dec. 2012. http://go.worldbank.org/L20948QYZ0
 Reinikka, Ritva. "Why Should Africa Invest in People Now?" The World Bank. ND. Web. 22 Dec. 2012. http://go.worldbank.org/CLSQ439QV0
 Trel, Michael. "Magazine Crams in Working Android Cellphone for Video Ad." DVICE. N.p., 3 Oct. 2012. Web. 22 Dec. 2012. http://dvice.com/archives/2012/10/crazy-video-mag.php
 In the interest of avoiding commercial endorsements, no citation offered - check for yourself.
 "Nokia Mobile Mathematics." Nokia. ND. Web. 22 Dec. 2012. http://projects.developer.nokia.com/Momaths
 "Google SMS Applications." Google. ND. Web. 22 Dec. 2012. http://www.google.com/mobile/sms/