Reliance Jio offers the slowest 4G service in India, as per data from telecom regulator TRAI's MySpeed portal. Jio has recorded the lowest average download speed of 6.2Mbps across the country, as compared to Airtel’s 11.4Mbps, which is the highest. Jio’s average upload speed of 2.4Mbps is the second-lowest after Reliance Communications’ 2.1Mbps, with Idea leading at 4.1Mbps.