I don't know if anyone else was looking for a wired mono headset with a boom mic that works with the Evo, but I sure was. I prefer these headsets for driving because the call clarity is much better for the person I am calling and I heard it is illegal to drive with headphones on in my state. However, I could find no mono headsets with a boom mike and a 3.5 mm tip for use with my splendid new phone. After much experimentation with my favorite old wired headsets (various plantronics models with 2.5mm tips) and some 2.5 to 3.5 mm adapters, I found a combination that works. You need: a 4-contact 2.5 mm female to 3.5 mm male adapter (like this) a 3-contact 2.5 mm mono headset (no button, button) This works with 2 models linked above. One of the models has a control button and a mute switch, both of which work with this setup. Strangely, a 4-contact headset and 4 contact adapter is recognized as well, but the sound from the headset earpiece is extremely low. Bonus hack: You can improve the sound of almost any earbud (the foam covered disc-shaped jobbies, not the type that fit in your ear canal) by slipping one of those funky jabra ear-gels over the bud. It blocks external sound and seems to channel the speaker output straight to your brain.