TATA DOCOMO is a Tata Teleservices Limiteds (TTSL) cellular service provider on the GSM platform-arising out of the Tata Groups strategic joint venture with Japanese telecom giant NTT Docomo in November 2008. Tata Teleservices has received a pan-India license to operate GSM telecom services, under the brand "TATA DOCOMO" and has also been allotted spectrum in 18 telecom Circles. TTSL has already rolled out its services in various circles.

It offers both prepaid and postpaid GSM cellular phone with presence in 11 circles including Madhya Pradesh & Chhattisgarh, Orissa, Maharashtra & Goa, Punjab (Punjab (India)), Haryana, Uttar Pradesh, Karnataka, Kerala, Tamil Nadu, and West Bengal. It has become very popular with its one second pulse especially in semi-urban and rural areas. They are launching their service from the south of India to central, east and north.