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 ...