When I'm talking on my i90 and the backlight is on, I've always
noticed a high pitched noise. I just recently changed the case on my
phone and the noise seems to be considerably louder. It's at the point
where it will become annoying in the weeks to come if I don't do
something about it. Has anyone else had this problem? And if so, have
you been able to resolve it and how? Thanks in advance!!

See More: i90 backlight noise???