I noticed this today, while connected to WiFi and on a phone call I get a strange ticking sound- it's like a faint click/tick every half second. I turned off my wifi and made a call and the sound is gone. Note this is on a VZ iPhone, not an At&t iPhone. Is this a frequent occurrence or a problem with my phone? EDIT: NEVERMIND. Did some research, this is a very common problem. Will visit the Apple Store for a replacement.