Voice Calls + Slow data speeds= 2/2.5G. Voice Calls + better data speeds = 3G. High speed data (when in motion and when stationary) + voice (carried either on 3G/2G or as VoLTE) = 4G. Super High speed data (voice also carried as data) = 5G.
Voice Calls + Slow data speeds= 2/2.5G. Voice Calls + better data speeds = 3G. High speed data (when in motion and when stationary) + voice (carried either on 3G/2G or as VoLTE) = 4G. Super High speed data (voice also carried as data) = 5G.