Microsoft on Tuesday announced OneApp, a software application for feature phones. Feature phones, which are essentially low-end mobile phones without any smartphone features, are widely used in both established and emerging markets. OneApp will give users access to mobile applications most often found on smartphones, including social networking, messaging and banking apps. Microsoft’s first partner for OneApp is South Africa’s Blue Label Telecoms. That makes sound business sense — the African market is growing, and World Cup soccer championships will be held in South Africa in 2010.