I think what Airtel has done is an ingenious way of cutting cost but at the same time I think the risk it assumes by this strategy is enormous.
outsourcing ur customer care has been a trend all over but when you outsource the infrastructure that is the back bone of your business that is a risk that needs a sound contingency plan.
Lets look at safaricom its customer care is dead they hav automated it making it moribund and unresponsive to customer needs. so if I was Bob I would partner with a world leader in outsourcing to make that sector of its business competitive and efficient such that they can leverage on it as a profitable BPO.
What I think Airtel has done is separate their business into specialized business units these business units then partner with world players to create an efficient synergistic companies .For instance Airtel has a separate infrastructure company (bharti Infratel Limited) that specializes in building BTS (providers of passive infrastructure services as they call it)
'......to the acknowledgment of the mystery of God, and of the Father, and of Christ; 3 In whom are hid all the treasures of wisdom and knowledge.' Colossians 2:2-3