Samsung Galaxy S3. The camera is just this side of entirely useless. After testing it, I keep my Elph 500 HS in the same pocket as the phone. It's a better camera by at least in order of magnitude, if not more.
I'm sent a lot of iPhone pictures for use and processing. In general, they're worse. The iPhone seems to like to shoot at high ISO a lot, but even at base ISO, the noise is absolutely horrible.