[8][9] Docomo, TTSL and Tata Sons had in March 2009 signed shareholder agreement for the business alliance.

[10] On 5 November 2010, Tata Docomo became the first private sector telecom company to launch 3G services in India.

[11] For the southern states of Tamil Nadu and Andhra Pradesh, actors Vijay and Ram Charan are the brand ambassadors respectively.

In October 2017, Bharti Airtel announced its acquisition of Tata Docomo having roughly 17 million subscribers.

[16] Following the RBI decision, the Tata Group offered to purchase Docomo's stake at ₹23.34 a share on the basis of a fair market value determined on 30 June 2014 by PwC.

[9] NTT Docomo then moved the London Court of International Arbitration seeking a valuation of ₹58 a share.

[18] On 31 October, $1.27 billion was paid to NTT Docomo by Tata Sons, thus ending the dispute.

[20] The Competition Commission of India (CCI) and the Department of Telecom (DoT) gave approval for Airtel to proceed with the deal.