I just got my Oppo N1 CM edition two days ago. The mic on the phone itself works just fine but whenever I plug in my headphones, I am almost completely inaudible to the person I'm speaking to. The issue isn't the headphones, since I've tried multiple pairs and they all have the same problem. Can't seem to find any posts about anyone experiencing the same problem with their N1. Since I wasn't sure whether it was a hardware/firmware issue, I emailed Oppo customer service first. That was a little over a day ago so I thought I'd try my luck here. Any idea if this is a known issue and whether there is a possible fix for it on my end?