5G promises theoretical transfer rates of up to 10 Gbps when at its fullest potential. ZTE will be showing off a Gigabit smartphone capable of transfer rates of up to 1 Gbps as a stepping stone to the 4G LTE successor.
http://www.notebookcheck.net/ZTE-teasing-5G-Gigabit-smartphone-for-MWC-2017.197890.0.html