If one of the mobile operators slashed interconnect rates, would people move to that operator as users did to Afrihost, for example? Granted, it's not as easy to switch cellphone contracts as it is to move ISP.
This has been stated many times before. If any operator drops interconnect rates on his own, he will be committing suicide. He is basically telling all the other operators to pay him less, with nothing in return, niks, nada! In fact, this operator's interconnect payments to other operators will remain the same, whlie other operators' interconnect payments to it will drop. This means the other operators are now able to drop call rates, due to cheaper interconnect rates, and customers will now flock in the other direction, achieving the totally opposite result. So there is no way you can compare dropping interconnect fees to an ISP slashing bandwidth prices.
That's why dropping interconnect rates has to be an industry-led cooperative initiative, or forced on all operators by the regulator, or government. In RSA, it seems we have a combination of both. It was going to be forced upon (and hopefully still will be) by ICASA and the PPC on Communications (in other words, guavament), the operators got scared, and decided to drop it co-operatively to a slightly lower rate, in order to appease guavament, ICASA, and consumers. No operator will take the initiative to drop interconnect rates, even if it means getting all the other players involved in the discussions. It doesn't serve their interests, or that of their shareholders. And when guavament is a shareholder in a company in any industry, that industry turns to sh|t.