I'm new to Android.
I've bought HTC Google Nexus One, it has Android 2.2 installed. On the next day it updated to Android 2.3.4.
So, the prolbem: when I make or receive calls interlocutor can't hear me at all or sometimes hears just noise. It happens pretty often, but not on every call.

Can you help me to find out what can be the problem and how to solve it.