Hi, when I tapped on the screen of the 6S Plus during use, I felt a hard solid glass. However, when tapping on the screen of the 15 Plus, I felt like there is a gap between the screen and the phone. How come? Is this normal?
Not sure what you mean? I have a 15 Plus and it just feels like tapping glass. There will be a small gap behind the screen and the components inside the body.