I have an iPhone 4. While talking on the iPhone today, I could barely hear the other person even though the volume was on the highest level and the phone was next to my cheek. The other person could hear me fine but I could barely hear him. When I changed over to speakerphone, then the call volume was fine and when I also switched to bluetooth headset, the call volume was fine as well. I have an appointment with the Genius bar later this week. Can anyone please suggest a solution or has this problem happened to you while using the new iPhone 4? I will try to do a restore but I'm not sure what else I can do to fix this problem. Thanks for your suggestions in advance.