You got me. I have few 9500s and never had this problem. My best guess
is bad battery contacts.
Are you using OEM original batteries or some after market stuff? This
might be a problem.
Batery contacts can be cleaned with an eraser or slightly pried
out...but if the contacts failed your phone would hang up and go dead
for a bit.
CDMangels.com has a forum with lots of 9500 info, but I've never read
anything like this.
The 9500 has excellent reception WITH the antenna up. The antenna down
during calling could put you quickly over the
edge, if the calls happen
to be intitiated in a fringe area.
I sure hope it's not some internal wiring loose, cause I've never
figured out how to open one of these up.
If worse comes to worse, you still have a one year manufacturer
warranty
-
David