MTN is a South African telecom company, present in almost all African countries. Momo stands for mobile money...

XAF and XOF are the currency codes of the CFA Franc fiat used in former french African colonies, in West Africa (XOF) and Central Africa (XAF) - fun fact: they both have the same exchange rate but are not always interchangeable, your XOF will not always be accepted in an XAF country, lol.