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 »
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