Never made a phone call?
In my experience the big internet market in Kenya and other African countries, at least in urban areas, is mobile based. A mobile phone is a basic business need, and far more prevalent than land lines, computers, mainstream internet use, or even reliable home power (using a laptop or mobile phone as a light source at night is not just a myth).
In this sense, Google have probably got the right idea - they seem to have their heads screwed on the right way over mobile internet and applications nowadays.