After using my iPhone in iPod mode on a flight from the west coast, my earpiece stopped working upon landing. I tried everything I could think of: turning the phone on and off, turning on and off airplane mode, soft reset, and finally i tried restoring the phone. None of that solved the problem. The rest of the iPhone worked well, including the phone using either the speaker phone or head phones. I was at the end of my rope when I googled the problem and found a few postings on other sites detailing similar trouble. It turns out the iPhone seems to have problems detecting when headphones have been removed. To solve the problem, I simply plugged and unplugged the head phones several times. Finally, the earpiece started working. The sad part of this story was how unhelpful the Apple Store was when I brought my phone in to discuss the problem. According to the person at the Genius Bar, they have "never heard of this problem before." After suggesting they google the problem, they offered to repair my phone if the problem continued but there was no mention of an exchanging. Anyone else have this problem? I couldn't find a post on mac forums about this yet but perhaps i missed it.