Mobile phones usually have a noise-
cancelling system to cut out ambient
noise. This is great.
But sometimes, I would like the ambient
noise to be heard - for example if I'm at a
music event or speech, or if I'm trying to
impress someone with my pianoic
abilities. On a regular mobile,
listener will hear is a muffled wubba-
So, it would be nice if one of the phone
buttons could temporarily disable the
ambient noise cancellation. Perhaps some
phones allow this already, in which case
this is redundant.