T Elango, President – Consumer Business, Tata Teleservices said: "As we rationalise our network assets on a staggered basis, we have decided to begin transitioning our mobile customers to the Airtel network under an ICR arrangement. We assure our customers of best in class services with zero disruption." Airtel and Tata Teleservices had recently announced an agreement to merge the Consumer Mobile Businesses of Tata Teleservices Limited and Tata Teleservices Maharashtra Limited into Airtel. The acquisition is currently undergoing regulatory approvals.