To make a call, from the home screen, tap the Phone icon.
Dial the desired number, then tap the Call icon.
To answer an incoming call, swipe over the Answer icon.
To reject an incoming call, swipe over the Decline icon.
To reject an incoming call and reply with a text message, swipe over the 'Decline with message' icon. Note: To create or edit text message replies from the home screen tap > Phone > Dial tab > Menu icon > Call settings > Decline with message.
Tap SEND next to the desired message.
When receiving an incoming call, the Call icon will display in the notifications bar. The icon will also appear if you navigate away from the Phone screen while a call is active. Note: To learn about calling or using your device in other countries, visit the AT&T International Calling website.