My friend says she was talking to her husband when he got another call. He switched over, took the call and came back to her. Then she heard another phone ringing in the background. (he was in his car) He said "ill call you back" and hung up. When he called back he claimed that he had conferenced in the other call and it was ringing back on his cars bluetooth. She said she didnt hear it ringing on the phone just in the background. I dont think its possible to be on the phone and the bluetooth doing something else. Am I correct?