Is it cheating if your husband has a phone installed in his car?

Either your husband has cheated before or you have a gut feeling he's cheating. Many men and women have car phones and it's not odd at all. If he's a businessman then it certainly would come in handy. If he wants to cheat he can cheat on his cell phone and doesn't need a car phone or he can call a girl from work if need be. I would get his car phone bill and check it against his cell phone bill.