3.1 fixes the high-pitch sound problem!

[newfoundglory]

If you had this problem with your 3GS you might not even have known it (depending on your age and hearing)

After sending a txt msg or plugging the phone into power/computer, it would produce a very high pitch sound (approx 15KHz)

I was beginning to go a little insane.

But, I can confirm the 3.1 update has fixed the problem for me!

 

[Resist]

Now if they would only fix the poor WiFi reception that has been an issue since 3.0.