The Nokia X1-01 is a music machine, as evidenced by the massive speaker on the back, which can deliver up to 106 phon. A phon (and you’re forgiven for not knowing – we didn’t until we looked it up on Wikipedia) is a unit of perceived loudness. If you have 106 of them in a mobile device, it’s loud enough to serve as a makeshift home-entertainment system. The speaker has also been specially tuned so that there’s little distortion, even when turned up to eleven. The Nokia X1-01 has in fact got the loudest and clearest speaker Nokia has ever produced! More after the break...