TATA DoCoMo ( टाटा डोकोमो ) , usually referred to as DoCoMo (not to be confused with NTT Docomo), is an Indian cellular service provider on the GSM and platform-arising out of the strategic joint venture between Tata Teleservices (subsidiary of Indian conglomerate Tata Group) and Japanese telecom giant NTT Docomo (subsidiary of Nippon Telegraph and Telephone) in November 2008. It is the country's sixth largest operator in terms of subscribers (including both GSM and CDMA).^{[citation needed]}

Tata DoCoMo received a license to operate GSM telecom services in 19 telecom Circles and has been allotted spectrum in 18 of these circles, under the brand "TATA DoCoMo". Tata Docomo launched GSM services on 24 June 2009. It first launched in South India and currently operates GSM services in 18 of 22 telecom circles. It has licence to operate in Delhi but has not been allocated spectrum from the Government. Docomo provides services throughout India. Tata DOCOMO offers both prepaid and postpaid cellular phone services. It has become very popular with its one second pulse especially in semi-urban and rural areas.