I just got a replacement iphone 5 and everything is working great but when i call someone or get a call they sound like something is blown. i dont now what the part is called but the part that you hold to your ear. even when i call someone and i hear their phone ringing in my ear its very distorted. I am assuming it can be blown but not sure. any idea if there is a way to fix this? its annoying to hear people through it.