If you have duplicate contacts, linking them in iOS may be the best way to get rid the clutter while preserving the original information.

The next time someone sends you a text message containing a phone number, here's how to quickly add it to your contacts.

When you create a new email on your iOS device and begin to type in a recipient, you may notice iOS automatically populating email addresses. These recent addresses are a combination of your contacts and people you’ve recently emailed.

Passcode Lock is a very useful feature to keep others out of your device. The downside is, certain features like Siri and Reply With Message are still available unless you disable them.

Configuring contact relationships for Siri can make things like sending messages, emails, or making calls a lot easier.