I tried again once this morning, to a different number. It rang OK, but call quality was pretty poor. Had to hang up after less than a minute, due to nasty feedback noise on my end. I experienced a similar noise problem on a domestic call about an hour or so ago. It occurred midway through the call; I was hearing feedback on my own voice, but not the caller's. It went away after about 15 seconds, but figured I should report it anyway.

I may get a chance to try again later (international), but probably not again before tomorrow...