I would appreciate hearing from someone who has had a similar problem and found a fix. I have done much searching/reading where many give 'try this' ideas (reboot, reset, etc) and OP's report back that those things did not fix the issues. My issue is when on wifi and in strong signal areas. Turned Siri off/on. The only thing I did different in past few days was hooking a borrowed/erased 3G (not 3GS). to my iTunes. My wife lost her Iphone 4 and AT&T store told her she had to connect to iTunes to activate it. She did not have an iTunes account (or it was on an old laptop she never uses and did not know how to use iTunes). Could hooking this old device/iOS to my itunes create my voice issue?