We usually say that 2G, 3G and 4G of mobile phone network represent the improvement of network transmission speed, but they are not very helpful for voice calls and short messages.

Voice also needs to be transmitted, and the signal strength affects the reception quality. As for the improvement of call quality, it depends on the mobile phone. The hardware is a receiver, and the software is called a radio. If the radio version is higher, the quality of the receiver is better, and the signals of both parties are stronger, the call quality and sound quality will naturally be better. Thank you.