While a call is active the Call icon will display in the Notification bar.
To answer a call, swipe the Answer icon up.
To decline a call, swipe the Decline icon up.
To reject an incoming call with a text message, swipe the Decline with message icon up. Note: To edit quick text message responses, from the home screen, tap the Phone icon > Menu icon > Call settings > Decline with message > Edit responses.
Tap the Desired text message to send.
To answer a call while on an active call, swipe the Answer icon up.
To decline a call while on an active call, swipe the Decline icon up. Note: To learn about calling or using your device in other countries, visit the AT&T International website.