NEW DELHI: Reliance Jio Infocomm’s average data download speed rose to 18.17 Mbps in December, almost twice that of closest rival Vodafone, putting the new entrant at the top of the pack within months of its commercial launch, according to the telecom regulator. The download speed on Reliance Jio, which offers services on a pan-India 4G network, was roughly four times higher than Airtel’s 4G speed of 4.74 Mbps in December. Vodafone’s 4G speed was 9.66 Mbps last month, as per data from TRAI. The 4G speed of the Mukesh Ambani-owned company, which started operations in September, has risen from 5.85 Mbps in November, as per the monthly average mobile data speed published by the regulator. Trai collects and computes the speed of mobile data from subscribers across the country on a real-time basis. Jio curtailed per-user data consumption to 1GB a day from 4 GB, which contributed to higher speeds, analysts said. The company extended its offer of free voice and data sservices by three months to March 31. Reliance Jio’s download speed in November was lower than the previous peak speed of 7.26 Mbps in September. Airtel’s speed was the highest at 12.03 Mbps in October and it fell to 6.175 Mbps in November. While taking both 3G and 4G data networks into account, Airtel’s average download speed slowed to 4.68 Mbps in December from 5.93 Mbps in November and was lower than 7.52 Mbps in October. The download speed on the Vodafone network increased to 6.7 Mbps in December from 4.9 Mbps in November. Idea’s speed improved to 5.037 Mbps last month from 4.36 Mbps in November.