I have modify sony offcial Call handling to bigger the mute button area.
In original version you can only press red area to mute, this mod allows you tap all the yellow area.
(This picture is use for explain, you won't see the red and yellow on your SW2.)
I think my finger are too thick and too hard to tap mute button, this is reason why I modify it.
This is a simple mod, I just replace two png file to the bigger one, and it is work.
Note: you need to uninstall old version in order to install this mod version