The new service is called iCloud Voicemail and it will allow the users to set custom voicemail responses, letting certain callers know where they are and why they cannot take their call.

It is unknown if the system would require carrier support. It is also not clear if it will be free. The company is reportedly testing the service and is not scheduled to launch until 2016.

With iOS 9, Siri can do more than ever, and new proactive suggestions help users get things done before they ask. The operating system enhances performance, battery life, and security.

Siri now has a feature called Proactive that can offer app suggestions and more based on context such as time of day or location. Siri see what apps you have on your phone and suggest useful ones based on what you're trying to do. It can also look into your inbox to ID incoming calls that aren't in your address book.