1. To answer a call, select Accept. To decline a call and send it directly to voicemail, select Decline.
   
   Note: If iPhone is locked while receiving a call, select and drag the Phone icon to the right to answer the call or press the Sleep/Wake button twice to decline the call. In some areas, declined calls are disconnected without being sent to voicemail.
   
   
   
   
2. To decline a call with a text message, select Message, then select the desired message. 
   
   Note: To create a custom reply, select Custom, enter the Desired message then select the Send icon.
   
   
   
   
3. To make a call, from the home screen select the Phone app.
   
   Note: To learn about calling or using your device in other countries, visit the AT&T International website.
   
   
   
   
4. To make a call from the Contacts list, select Contacts, then select the desired contact.
   
   
   
   
5. Select the call icon.
   
   
   
   
6. To make a call from Recent or missed calls, select Recents, then select the desired contact or number.
   
   
   
   
7. To dial a number to call, select Keypad. Enter the desired number, then select the Call icon.
   
   
   
   
8. To call a Favorite contact, select Favorites then select the desired contact.
   
   
   
   
9. To end the call, select the End call icon.
   
   Note: Learn more from Apple support article: If you can't make or receive calls on your iPhone.