Except if the cost of the 800 number incoming calls is more than the cost of however you can minimise your outgoing calls.
There was a similar situation in Australia where long-distance phone card providers wanted to ensure their relevancy in an age of decreased landline connections. Mobile phone calls to 800 numbers still cost the caller money and the reciever (which is why the telcos agreed this year to exempt counselling hotlines).
So instead they decided to setup hotline mobile phone connections to enter your phone card details, thus taking advantage of inside-same-network free calling. The telcos had none of it and just charged premium rates for those specific normal looking mobile phone numbers. I bet Indian telcos will be looking to do the same anytime soon.
There was a similar situation in Australia where long-distance phone card providers wanted to ensure their relevancy in an age of decreased landline connections. Mobile phone calls to 800 numbers still cost the caller money and the reciever (which is why the telcos agreed this year to exempt counselling hotlines).
So instead they decided to setup hotline mobile phone connections to enter your phone card details, thus taking advantage of inside-same-network free calling. The telcos had none of it and just charged premium rates for those specific normal looking mobile phone numbers. I bet Indian telcos will be looking to do the same anytime soon.