This single feature may make upgrading to iOS 9 worth the effort.
About 10 times every day some “Unknown” person calls my phone, and fearing an untimely/uncomfortable/tedious/unnecessary conversation, I often don’t pick up. They often don’t leave voicemail, so I’m left to wonder if I just refused a call from somebody important.
Apple’s new iOS 9 mobile operating system contains a very cool new feature that attempts to help you out with that problem.