Hello. I got my iPhone 4 in the UK on release date and my local o2 shop. Was very happy with it, until I recorded Video. Why is my iPhone 4 so quiet in recording the audio within the video? I played a song on my iMac on full volume, recorded a video with my iPhone 4 right next to it, and I can only hear the song faintly. Is there a defect with my phone, and do you think o2 will replace it ? I would appreciate it if anyone could help me with this issue. Thanks.