I've had this phone for about a month or so and besides the size of it, it's awesome.
However, in the last few days, I've lost all sound on calls. Putting the speakerphone on allows me to hear things going on in the call, so I know it's connecting (I can also see the phone I'm calling ring). At this point, I've done a factory reset and removed the last few applications I've installed so I'm kind of at a loss why the earpiece just up and stopped working.