As i dey reason i come they believe say soon na e-Sim go they all over Nigeria since GLO done start other network fit start here.
I do not remember the year MTN has been supporting e-sim but I think it should be more than 3 years now. But what that happens is that not all phones are supporting it. Those flagship phones and very few flagship killers that are supporting it. I have not yet seen low budget phone that is supporting it.
MTN I think is the first network provider in Nigeria that first introduced e-Sim to their users. Just like you said, it's actually supported by high technological performance phones like the Samsung Galaxy and S series, iPhones and the Google Pixel Pro series. I know the other top smartphone brands that are already advertising to flood the market with their e-Sim series but I doubt they'll be as high performing as the above listed three brands. However, I believe in no distant time, e-Sim usage will become very common among Nigerians.
MTN introduced the e Sim technology as an demonstration to company's commitment to innovation and to provide accurate fast speed network and also more Nigeria are being to become more aware of the e Sim technology and the demands os becoming increasingly driven MTN innovation and investment sectors.