Voicemail changes

What has happened to voicemail? Why does it no longer show who’s calling and what they said? Our phones all has a Call Voicemail button and it just starts playing message and you can’t see who, when and time of call. You have to listen to every voicemail on your phone: and it does not alert you when there’s a voicemail: my husband missed 3 very important business calls because of it. Plus there was no warning of the change. Thank you, Cara

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