The iPhone may be the best music player Apple has ever made, and it may also be a breakthrough web device. Answering a telephone call on the revolutionary device? Not so straightforward. At least not for Meredith Vieira of the Today Show — last seen on Valleywag when she gushed over Facebook's Mark Zuckerberg . Proving that even a $10m-a-year chat-show host can have as much trouble with a demo as any tech-industry titan, Vieira answers a call from her co-host, Matt Lauer, in London. Or attempts to. Click to watch the clip.