Will 4G Calling improve the quality of my call?

Yes. 4G calls are much better quality than normal calls made over 2G and 3G connections. This is because more data can be transferred over 4G (up to three times as much as 3G, and up to six times as much as 2G). You'll find it easier to hear what the other person is saying, and their tone of voice will be richer and clearer too.