I really like my S56- the RF is about as good as I can expect in the areas
of LA where I frequent that have miserable coverage. It's much better than
the Sony Ericsson T68M I had- with the Siemens, I get a clear and usable
signal in places where the Ericsson just didn't work at all, or sounded
terrible.

I've used the speakerphone, it works okay in a quiet room- the caller's
voice sounds like you would expect from a speaker the size of a fingernail,
but they said they could hear me okay and it was handy in a pinch where
I needed my hands free and the room was quiet.