How cool is this?

Every cell phone these days has a headphone jack, and many use the same type of plug (2.5-mm). That’s why companies like Jabra can sell earphones or headsets that work with most cell phones.

But this is so much cooler. You can buy a 2.5-mm plug at Radio Shack and attach a standard telelphone headset to it so you can use that with your mobile:

For about $3.00 and some time soldering four simple connections, you can blow the minds of the people around you when you whip this puppy out.

Full, detailed instructions are over at iHacked.com, although to be honest if you’ve ever messed around with telephones this picture pretty much tells you all you need to know:

Feeling lazy? Just buy one from ThinkGeek.