Last week Airtel had bad memmory week. There was fire in the building where their telecom switches are located. There was some short circuit in the power cables, this gave a setback to Airtel in Mumbai.
"Welcome to the Vodafone Mumbai Network. Happy to help" is the message
that greeted Airtel users in Mumbai. It was Vodafone who helped its rivals in their crucial time.
I think it was very good decision by Vodafone seniors, as this was not only a sympathy to rival but also sympathy of Airtel customers. A very very nice marketing move by decision makers...
They aren't rivals anymore, they together have a company named Airtel-Vodafone which operates in Jersey and Guernsey near UK
Check their official url
http://www.airtel-vodafone.gg
http://www.airtel-vodafone.je