28% of Africans now have a mobile phone subscription, according to data released by the ITU earlier this year, part of a larger trend that sees two out of every three mobile subscribers around the world living in a developing country. The flagship ITU publication Measuring the Information Society (pdf) notes that two-thirds of the world's cell phone subscriptions are in developing nations, with Africa, which has a 2% subscriber rate as recently as 2000, growing the fastest. And it is not only adults who are making use of this new technology. Survey work at a low-income high school in South Africa's Samora Machel township suggests that mobile penetration among youth in some places might be higher than one might suspect.