About the Contacts app
When you add contacts to the Contacts app on your BlackBerry device, connecting with them is easy. The Contacts app is integrated with the BlackBerry Hub, the BlackBerry Calendar, and other apps, so you can quickly add contacts to relevant messages and events or share your pictures and videos.
If you added an email account or social networking account to your device, contacts from those accounts can appear in your contact list. It's simple to find the people that you want to connect with because your device automatically merges contacts who share first and last names, email addresses, or mobile phone numbers.