Africa has world’s highest mobile growth rate; with Mobile phone penetration is six times Internet penetration -- one third of the population owns a mobile phone and many more have access to one. Most of these devices only have voice and SMS capabilities, which is why Google released Google SMS in Uganda. Google SMS is a suite of mobile applications which provides access, via SMS, to information on a diverse number of topics including health and agriculture tips, news, local weather, sports, and more. The suite also includes Google Trader, a marketplace application that helps buyers and sellers find each other. Google SMS Tips is an SMS-based query-and-answer service. After you text a free-form query, Google algorithms restructure the query to identify keywords, search a database to identify relevant answers, and return the most relevant answer.
More info: Google Blog