iPhone doesn't work with most 3rd party headphones
As several tipsters have pointed out, the recessed iPhone headphone port means that a lot of third party headphones don't work properly: we've tested a few models already (you can see the current list after the break), but maybe you can help us out and let us know which models work / don't work in the comments -- and yes, if you have to press down on the jack to get both channels to play sound, we count that as not working. You'll need to buy a $10 headphone adapter if you want most third party headphones to function correctly, which sounds like a great business plan to us: just break an important device function, and sell the solution for fun and profit. For now, one of the few third party 'phones that do work are the Zune headphones.
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Do Work
• iPod headphones
• Zune headphones (despite the tension in the air, the Zune's headphones do work on the iPhone)
• Etymotic ER6i
Don't work
• Shure E4c
• Ultimate Ears Super.fi 5 Pro
• Sony MDR-V150
• Generic wrap-around headphones
• Grado SR80
