T-Mobile Austria has revealed that its in-deployment Long Term Evolution (LTE) network is currently available to over 650,000 citizens in Vienna, Linz, Graz and Innsbruck. The cellco has indicated that its network will be further expanded in 2012. In December 2010 T-Mobile contracted Chinese vendor Huawei Technologies to roll out the remainder of its LTE network, simultaneously upgrading its GSM infrastructure. The contract runs until 2016. Previously, T-Mobile estimated that at least 25% of the Austrian population would be using 4G technology by 2013.