In May, the Department of Telecommunications (DoT) had allotted spectrum to Reliance Jio, Bharti Airtel, and Vodafone Idea to conduct 5G trials in the 700 Mhz, 3.5 GHz, and 26 GHz bands across select cities for six months. It was to end in November 2021, but the DoT extended the trial period to May 2022 .