Around 800 million people worldwide cannot read or write their mother tongue. Most of them live in developing countries mainly in rural areas. Mobile phones have been a phenomenal success in terms of sustainable development and its business model proved viable in many developing countries despite huge infrastructural shortcomings in terms of e.g. the availability of electricity. Coverage has seen huge improvements and most of the growth for mobile provider now lies in attracting customers in rural areas who mainly work in agriculture. Low-end smart phones with touch screens have already dropped below the $100 mark and will be soon within financial reach of less affluent rural