Thanks Korosho,
Actually in my structure thesis I have specified Dar es Salaam as a case study!!!
About q.10 I agree with you completely with expanding more options BUT my research intends to ficus on internet users specifically although I might mention in my results that how many people in Dar es Salaam maybe do NOT have mobile phones....That can be another scope of another project
Thanks Korosho for your inputs and actually you can help me yes by advising on the literatures you have used in your reseach as well.
Brainpower sure I will put the results for you all guys, thanks a lot buddy!!!