LTE (Long Term Evolution) is not as much a technology as it is the path followed to achieve 5G speeds. As it stands, most of the time when your phone displays the “5G” symbol in the upper right corner, it does not really mean it.
When the ITU-R set the minimum speeds for 5G, they were a bit unreachable, despite the amount of money tech manufacturers put into achieving them. In response, the regulating body decided that LTE, the name given to the technology used in pursuit of those standards, could be labelled as 5G if it provided a substantial improvement over the 4G technology.
With the introduction of LTE, Voice calls can now be transmitted over a wireless infrastructure without any packet loss or drop call experiences.