I called Sprint CS. They have not yet been trained on Touch Pro according to rep. They referred me to HTC support. (866) 449-8358. This was the first the HTC rep heard of the problem and he pulled up this thread. Per his direction, I attempted to do a hard reset and could not get phone to do this following instructions in the manuel. He then had me do start/settings/system/clear storage would he said would accomplish the same thing as a hard restart. Did all that and no change in audio. He said that this would confirm that there was no software problem with my phone and that the problem must be hardware related.
He did not have any other suggestions other than for us to make a post on htcwiki.com, which he said is monitored by HTC senior techs.
