Hi from the admin. Thanks for your question. Actually, a Nigeria article has already been drafted. It's the biggest market we haven't still covered yet. So I'm working on it later this summer.
There are 4 major operators. But Etisalat has exited the market shortly and their old network was rebranded to 9mobile. I wanted to wait until this has settled and the new 9mobile portfolio is offered.
So you can expect an article about Nigeria later this year as for most other African nations which are still missing.