After a couple attempts, I just decided the N1 speakerphone was garbage. I could hear the other person fine, but they said it was very difficult to understand me. I made a recording on my voicemail, using speakerphone, and it is indeed very difficult to understand. It's a garbled/underwater type of thing. For a couple weeks, I assumed it was just that the phone was designed poorly. But my friend got an N1, so we did some comparisons. His speakerphone sounds fine (not a Nokia, but way better than my N1). So I'm returning it to HTC for a swap. This is just a heads-up to people who maybe don't use the speakerphone (those who do, already know if they have a bad one or not). If you think you might someday sell the phone, you probably want all of its features working correctly, and may want to consider RMA.