The number of active 4G SIM cards in Austria more than doubled in the fourth quarter of 2015, with the total exceeding the one million milestone during the three-month period. According to the quarterly statistics report published by the Regulatory Authority for Broadcasting & Telecoms (RTR), the country ended December 2015 with 1.01 million LTE-enabled SIM cards, up from 440,000 three months earlier and just 162,000 as of 31 December 2014.