Mobile money: the continent's quiet financial revolution
Since M-Pesa launched in Kenya in 2007, phone-based payments have reached people banks never did. A briefing on how it works, who uses it and where it is going next.

When M-Pesa launched in Kenya in 2007, it offered something simple: a way to send money to another phone, and to turn it back into cash at a nearby agent. It required no bank account, no branch and no paperwork. Today, sub-Saharan Africa is home to roughly half of the world's registered mobile-money accounts.
How it works
A customer deposits cash with a local agent, who credits the amount to the customer's phone wallet. From there the money can be sent, used to pay for goods or bills, or withdrawn at any agent. The agents, thousands of small kiosks and shops, are the real network: they are why the system works where bank branches never arrived.
Agents must keep both cash and electronic balances on hand. Running out of either is among the most common frustrations: a customer may be unable to withdraw money that is already on the phone because the nearest agent is short of cash. Providers invest heavily in managing this float, and the quality of the agent network is often what separates one service from another.

Beyond payments
Once people have a wallet, other services follow: savings accounts, small loans, insurance and pay-as-you-go solar power. For farmers and shopkeepers with irregular incomes, a record of transactions can become a credit history for the first time.
The risks
Rapid growth brings real risks: fraud, unreliable agents, unclear fees and, for regulators, the challenge of supervising providers that are part telecom company and part bank. Interoperability, the ability to send money between different providers, remains uneven.
Regulators in many countries have responded by requiring providers to hold customer balances in protected accounts at commercial banks, by setting limits on transactions and by demanding clearer disclosure of fees. The aim is to keep the system's simplicity while making sure that people's savings are safe.
Access is the start of inclusion, not the end of it.
The next chapter is cross-border: connecting wallets between countries so that a trader in one capital can pay a supplier in another as easily as paying a neighbour. If that works, mobile money will do for African trade what it already did for African households.