I have what I assume is a hardware problem that is going to require
service, but I thought I'd check and see if maybe there isn't
something I can do myself. My phone has been operating without trouble
for months. Today, I used the earpiece and when a call came in and I
pulled out the earpiece so I could use the phone without it, I could
hear nothing. This had happened to me previously with the first
edition o2 xda on ocassion, but after reinserting the earpiece plug
then pulling it back out, the normal speaker function returned. Not
this time. I did a reset. Still no fix.

When the phone rings, I can't hear the ringing or the person on the
other end when I answer the call. Ditto all other sound functions:
With the earpiece, I can hear everything fine. Without it, all is
mute. I have checked all the obvious things -- the sound and
notification settings, the mute button. I can't fix it. I fear that
I'm going to have to exercise the warranty, which will be a real pain.
Any advice that spares me this experience much appreciated.