I don't want to crash the party but the speaker is just lame, it's positioned at the right side bottom of the phone which means that when you hold the phone you will cover the speaker (left hand with your fingers, holding it with right hand isn't an option because the speaker is in the palm of your hand) The speaker is tiny and totally not loud, and when watching a video you can hear the sound come out of the right corner instead from the phone, it's very directional, i am very disappointed about this.
Also sound through headphones is not as good as i would have liked and certainly not as full sounding as with S3.