Research has shown the most effective way to expand lower-income populations’ access to formal financial services is through a digital channel, and the optimal digital channel is the cell phone. Nine in 10 Kenya adults and four in five adults in Tanzania and Nigeria have mobile phone and SIM card access. Comparing FII countries, more mobile phone users in Africa use their phones for advanced services than do those in Asia. The least likely groups to own mobile phones across FII countries are females, rural residents, and the poor, which is a barrier to digital financial services uptake. As more people across the globe begin to use mobile phones and digital financial services, providers will have a wider opportunity to know their customers digitally and offer them products better suited to their needs.