The best part about the LG Tone Infinim (HBS-900) Bluetooth headset ($149 from AT&T, varies at Amazon) has nothing to do with its top bullet point, the inclusion of Harman-Kardon sound. No, the most important part of this neck-wraparound device is much more simple than wave form algorithms or any other sort of audio jargon. It’s not even the slick integration of notifications, so you can hear what folks are pinging you for without having to look at your phone. It’s not even the redesigned buttons. No, it comes down to this: No more loose wires.