Enter the desired phone number, then tap the Call icon.
While a call is active the Call icon will display in the notification bar.
To answer an incoming call, swipe the Answer icon to the right.
To send an incoming call directly to voicemail, swipe the Ignore icon to the left.
To reject an incoming call with a message, swipe up Reject call with message. Note: Visit the AT&T International Calling website for help making calls to or roaming in another country.