The (call) speaker sound is great, better than most.

The phone's loudspeaker is average. It lacks Bass and general volume, its really bad decision on Samsung's end....then again the loudspeaker on the Gnex is just as bad or worse.

The headset performance is good. Its a little better than the SII's but not much better than average. Audiophiles would cringe. Frankly the original SGS with the VooDoo Fix had much much better performance, I hope Samsung will learn.