sentences:  On July 1, 2019, The consumer mobile business of Tata Teleservices has become part of telecom operator Bharti Airtel.Airtel will absorb the Tata Sons-owned telco's consumer mobile operations in 19 circles across India — 17 under Tata Teleservices and two under Tata Teleservices (Maharashtra) Ltd. As part of the proposed agreement, Airtel will also take over a small portion of the unpaid spectrum liability of Tata Teleservices.The Bharti Airtel will get an additional 178.5 MHz of spectrum in three bands—1800 MHz, 2100 MHz and 850 MHz—that are widely used for 4G, an area where Airtel is expanding fast to keep pace with Reliance Jio Infocomm.