This is a feature of WP that was obviously an oversight by the engineers. Some ppl can hear their tones louder than others, and like I mentioned before it is completely annoying especially when you are on an important call. The callers on the other end CAN hear this tone! Its a simple software fix, that hopefully changes with the next update.
Right, but all sounds should be disabled while using the phone app. This is the first phone that I've had that does this. Every other phone disables message tones while inside a call. The ppl on the other end can hear the sound as well, which is not good.
Android has such a feature too but you can turn it off. I was just stating what it is. I have to agree that sometimes is too loud and should be fixed or even give the option to turn it off.