It's probably best to show you some examples of existing services:

Vodafone M-pesa is the best known brand in the sector we're hoping to entering
https://www.mpesa.in/portal/

This is Ecobank Mobile Money
http://www.ecobank.com/mobileMoney.aspx

Orange is also trying to enter the market
http://www.ft.com/cms/s/0/71481c3e-3dc8-11e4-b782-00144feabdc0.html



Articles:
1. https://hbr.org/2014/09/mobile-money-is-driving-africas-cashless-future/
2. http://blogs.wsj.com/frontiers/2014/09/03/mobile-money-the-battle-for-africa/
3. http://www.pcworld.com/article/2682772/kenya-takes-lead-in-booming-african-mobile-money-market.html

Hope that helps