VoLTE, or Voice over LTE, is a technology that allows voice calls to be made over a 4G LTE network instead of traditional circuit-switched networks. This means that calls can be clearer and connect faster, as data and voice are transmitted over the same network. With VoLTE, users can enjoy high-definition voice quality and simultaneous use of data services while on a call. This allows for activities like browsing the internet or streaming music without interrupting the call, enhancing the overall user experience on mobile devices.