Plantronics 320 works good for calls purposes with the Mogul, and when I had the Moto Q also with Sprint I used to listen, with the same headset, to my Audio files through the WMP, Internet streaming and Sling Media Player.
Also calls and TXT MSG alerts I used to have them directed to the headset directly, without any hacks or tweaks, to the headset with the Moto Q but NOT with the Mogul
Also there is a lag between the time I accept the call from my headset and when I actually hear any thing in the headset.