Open the Contacts application.
Tap the contact with whom you want to communicate.
In the contact’s details screen, tap the way to start communicating with the contact.
The Dial icon
places a call to the number.
The Message icon
starts a message.
The Mail icon
starts an email.
The Chat icon
starts a chat.
Anytime you see the Dial icon
next to a number, such as in your Favorites
or Call log, just tap it to call that number.