Whilst you can use any kind of headphone with the new 3G iPhone, the original iPhone had a socket that was too small to accomodate any headphone or earphone. An easy way to get around this was to purchase a headphone adapter. iPhone Headphone Adapters are inexpensive, and they give you the benefit of listening to your iPhone through quality headphones of your choice. You can purchase them here.
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 35 mm Earphone Headset Headphone Adapter for iPhone 4 Bids - 41m US $2.00 |
 New 35mm Earphone Headphone Headset Adapter for iPhone  - 1h US $3.59 |
 NEW FOR IPHONE 3G 35MM EARPHONE HEADPHONE ADAPTER - 1h 8m US $3.98 |
 35 mm Headset Headphone Adapter Converter for iPhone - 1h 47m US $3.88 |
 35mm Earphone Headphone Adapter Mic Volume for iPhone - 1h 59m US $4.98 |
 35mm Headphone MIC Adapter Converter for iPhone New - 2h 26m US $4.98 |
 New 35mm Earphone Headset Headphone Adapter for iPhone - 3h 47m US $3.99 |
 FOR IPHONE 1ST 2ND 3G 35MM HEADPHONE ADAPTER CABLE NEW - 4h 20m US $5.50 |
 35 mm Earphone Headphone Converter Adapter for IPhone - 4h 22m US $3.99 |
 35mm Earphone Headphone Adapter Converter for iPhone - 4h 27m US $3.98 |
 New Black 35mm to 25mm HeadPhone Adapter For iPhone - 5h 25m US $4.99 |
 Stereo Headphone HeadSet Adapter Cable 35mm for iPhone - 5h 27m US $3.99 |
