Telstra 4G in demand

Telstra has added 3.4 million 4G devices to its mobile network since launching the ultra-fast service two years ago. This includes more than 360,000 smartphones since June 30 this year. There has been a 23 per cent increase in demand for data every month as 3G customers switched to 4G. There are about 15 million mobile devices on Telstra's network.