I've experienced this, too. It is very very very faint. So faint, in fact, that I thought it was my mind playing tricks on me. I recently switched to a new LG 6100 to see if it would solve a different problem I'm having. (When I'm out of my home area, the caller id doesn't show up until I answer the phone; the new phone didn't help. It's a software glitch on the 6100 that hopefully will be fixed soon.) This new phone doesn't seem to have that problem.