As said 5G mobile wireless will go even faster than fibre. 2001, the third-generation swapped clunky old circuit-switching for efficient packet-switching. Around 2010, fourth-generation networks adopted IP (internet protocol) technology in a big way, providing mobile devices with broadband access to the internet. Each generational change brought new frequency bands, higher speeds and greater emphasis on streaming data rather than simply transmitting voice. Recently, wireless operators have begun wondering what to include in fifth-generation (5G) networks. There is a feeling of urgency as outside heavyweights like Google and Facebook threaten to upset their cosy business. If the mobile carriers can agree among themselves, they hope to have their fifth-generation networks in place by 2020.