Hi guys, I've owned an iPhone 3G for about 6 months now and it's been great so far. Last week I noticed that the ORM earphone mic (the one that came with the iphone) no longer works, basically no more "hand free" for me. Now the problem is that I'm not sure whether the earphone mic is busted or if the earphone port on the actually phone is busted. I'm in Australia and I'm currently on a 12 months contract with Optus. Should I go to Apple or Optus for warranty?