Shares of telecom companies, Bharti Airtel and Tata Teleservices (Maharashtra), have rallied by up to 10% after Sunil Mittal - owned Bharti Airtel agreed to take over Tata Group's mobile services business. Bharti Airtel, India's largest telecommunications services provider and Tata, India's leading conglomerate, on Thursday announced that they have entered into an understanding ("Agreement") to merge Consumer Mobile Businesses (CMB) of Tata Teleservices (TTSL) and TTML into Bharti Airtel. The acquisition is subject to requisite regulatory approvals. "As part of the Agreement, Bharti Airtel will absorb Tata CMB's operations across the country in nineteen circles (17 under