I use these:
http://www.amazon.com/Handfree-Heads...1939811&sr=8-1
They work great even though they say they are for the LG Chocolate. They come with 3.5 mm headphones, but you can switch them out for your own pair. I like this adapter because it has a volume dial on it and a good mic. My callers don't have any problems hearing me. Nor do I have any problems hearing them
Also, I had the adapter from Verizon with the mic. I didn't like it because it switched to mono when a call came in. This made it very difficult to hear calls when then came in over my car stereo. The LG adapter stays stereo even when a call comes in. This makes it much easier to hear my calls when I am in my car or when I am walking down a busy street.