Raymond Lee is an expert in electronic payment systems. Currently he's working on contactless payment systems, but on Tuesday he will be explaining how mobile technology is changing lives in Africa. Raymond says...

"MPesa is a way of using mobile phones to transfer money to both individuals and companies and is now the main form of banking in Kenya. It has allowed people to get paid, in some cases for the first time, the amount they were due and allows shops to accept MPesa transactions as payment."