I noticed the same, in terms of it seems like I cant hear the calls good when I have the phone up to my ear ( and I have great hearing), and find myself turning the volume up, and I find it even worse when I have it on speaker. Its very quite, and not suitable for the highway. Its making me for sure getting a Bluetooth headset for highway, etc. Other then the fact it seems to lack a good loud volume and and bass, it sounds great to me...Its disappointing, but you could always get a headset, or an external speaker if need be.