Tata Docomo was an Indian mobile network operator, a wholly owned subsidiary of Tata Teleservices deriving its name from NTT Docomo who invested in the company in 2008. In October-2017, Bharti Airtel announced a merger deal with Tata Teleservices and the acquisition of Tata Docomo. As of 07-July-2019, all Tata Docomo users were migrated to Bharti Airtel and hence became Airtel users.