Reliance Jio on Thursday announced that it would once again make off-net domestic voice calls free on its network starting January 1, 2021. The operator will restart its earlier practice over a year, after it started charging its subscribers 6 paise a minute to make voice calls to other mobile networks. The fresh decision came as a result of the ‘Bill and Keep' regime that the Telecom Regulatory Authority of India (TRAI) is implementing in the country from January 1 that will end interconnect usage charges (IUC) for all domestic voice calls.