Wondering if anyone else has had a problem (and possibly a solution) getting call waiting to work. I've had my car about 2 weeks and have heard the call waiting tone in 3 separate phone calls, but was never presented an option to switch to the incoming call. I do not have the Tech package and was beginning to think it wasn't included without Tech until last night I got the tone during a call and was presented with the menu to accept/switch calls. I have an iPhone 4S, all other bluetooth features seem to work without problem. Anyone else have this?