I know others reviewing this case have had problems with the sound. This isn't something I have a problem with. The case works quite well. I will say that the speaker is just a bit lower than the phone without a case at all. The amount of this muffling as others have called it is negligible at best. No one has told me of any difficulties hearing me while talking to them on my phone. This is a great case though admittedly not for everyone. It does add considerable bulk, which doesn't bother me. I've been using the case almost 2 weeks in pretty harsh enviroments and have no issues whatsoever. The openings to utilize the back and menu buttons could be a bit bigger, but all in all a well made well thought out case that I must say stands well above the other heavy duty cases out there.