[u8myfoood]

Same thing happens to me sometime, I think this is a problem with WM6 since my old Mogul had the same problem too. Once you call back it should be fine. But it can also be what Deimoss said, if you installed the loudest one, that might cause the feedback echo, a lot of other people had problems with that one, I suggest the mid setting one, works well for me. I only get the echo problem once in a blue moon after using that one.