South Africa has a population of 49 million people, who own 43 million mobile phone handsets, most of them pay as you go. Every year around 350,000 people die of Aids-related diseases in the country. Now a new venture, Project Masiluleka, is trying something new, sending a million free text messages a day to urge people to be tested and treated.
When a trial of the project was held, there was a 200% increase in calls to the National Aids helpline in Johannesburg.
According to the United Nations, around six million people are currently living with HIV in South Africa.
