Click on Contacts to open your address book. Click on the gear icon at the bottom left corner of the screen and click “Select All” if you want to delete all contacts.

Your Favorites list on your iPhone, or any iOS device, allows you to quickly access contacts without endlessly scrolling through your address book. Visit Business Insider's homepage for more stories.

How to Delete Duplicate Contacts in Outlook By Rick Broida Updated on: November 28, 2007 / 9:17 AM EST / MoneyWatch Duplicates happen.