Get message to reset voice mail passcode
My wife has an iPhone 6. After missing a call she got a voice mail from the caller. When she tried to check the voice mail, she got a message to reset an expired passcode. We have ATT phone service. Our current passcode works fine on the home line. I have an iPhone 5 and have never been requested to change any passcode for the voice mail. What do I need to do to my wife's phone so that she can hear the voice mail?