Your response will be influenced from which side of the coin you are looking at it. How about old mama who can neither read nor write but uses phone, don’t you think that simple phone will be best for her? Considering the price and power consumption! Now come to the other people who reside in the urban areas with low income… they definitely don’t need this phone (SMS/voice only phone). They like to have good things but dont have much to buy them. For now in Lagos, China phones dominates the market. Nokia phones that goes for N60,000, you can buy the chinese (clone) version generally called “Chinko” for N6,000 with all functionality (Data, Voice and multimedia) they’d like to buy an iphone if they can get it cheaper.
So knowing really who you target should be the main influence on what is being develop/produced.