LTE, or Long-Term Evolution, is a standard for wireless broadband communication and is considered the next step beyond 3G, often referred to as 4G LTE. VoLTE, Voice over Long-Term Evolution, is a technology that allows voice calls to be made over an LTE network rather than traditional circuit-switched networks. Therefore, LTE itself is not marketed as 3G, and VoLTE is a voice service that runs on an LTE data network, not a distinct marketing category like 'advanced 3G'. LTE is a versatile technology that supports both data and voice services (via VoLTE), and VoLTE is specifically for voice calls over LTE, not a voice-only technology in isolation.