Since the first iPhone, Apple has improved the user experience with its Visual Voicemail is a kind of visual electronic secretary. Unfortunately, in Brazil, only the operator Claro supports this feature.
But, according to the Business Insider, Apple is working to implement a proprietary electronic secretary integrated Crab. The assistant can answer calls when the user is unavailable and transcribe people's messages, even informing them why the call could not be answered. Everything would be stored in iCloud.
Sources claim that the feature (known as “iCloud Voicemail”) is already in internal testing at Apple, but that if something is released for 2016 that is, probably for iOS 10.