News 21.5.2015 17:32 | updated 21.5.2015 17:32 5G test network opens in Oulu The ultra-high-speed wireless network will be opened to the public next month. 5G is touted as being more flexible and using less energy and materials to operate. Image: Risto Degerman / Yle A test network for 5G wireless communications was launched in the northern Finnish city of Oulu on Thursday. At..