mobile phone coverage

See the following -

Mobile Phones And Economic Development In Africa

Jenny C. Aker and Isaac M. Mbiti | Journal of Economic Perspectives (JEP) | June 1, 2010

Sub-Saharan Africa has some of the lowest levels of infrastructure investment in the world. [...] Yet access to and use of mobile telephony in sub-Saharan Africa has increased dramatically over the past decade. Read More »