mostly true, but there is at least some undersea cable infrastructure to and between the countries. See https://en.wikipedia.org/wiki/WACS_(cable_system) https:

mostly true, but there is at least some undersea cable infrastructure to and between the countries. See https://en.wikipedia.org/wiki/WACS_(cable_system) https://en.wikipedia.org/wiki/WACS_(cable_system) as an example. Bottlenecks tend to be within countries where fibre is often not built out further than the capitals, especially in the poorest ones like Guinea and Sierra Leone, where I was working on networks this year. On the other hand, Cote D'Ivoire has a very good infrasructure, and internet is much more accessible than elsewhere. I believe Senegal, the digital powerhouse of the West Africa region, at least, has the same. But much internet is still only point-to-point microwave if you're lucky (and that supports telephone and mobile data communication backbones too), or VSAT, if you're not.