I was having network issues with vodafone , so thought of porting my number to Airtel postpaid , so I requested a call back from them , the airtel executive called me and documents were collected on the same day , they told me that it will take 7 business days to het your sim card activated , waited for 10-12 days , then got a message there is some problem in porting your sim card , called them no reply , still waiting for a proper response from them.
They are too slow , don’t go for airtel.