> it's only some parts of Africa

I think it would be safe to say that the vast majority of Africa is connectivity/bandwidth starved.

Even in a (very) affluent South African neighbourhood, I struggled to get one of our remote workers a connection faster than 512kbps. And even that cost significantly more than our local (UK) connections which are comparatively overpriced.

(This was about 18 months ago, the landscape could have obviously changed).

Many of my African contacts rely on low-bandwidth comms such as GPRS or SMS. I guess that's why mobile banking (often via SIM Application Toolkit) is so popular. Same goes for WhatsApp.

Don't forget about North Africa, i.e. all non-sub-saharan Africa. That probably has much better connectivity across the board.