how do i pause for an extension autodial
1 Open your iPhone address book and click edit on the contact you'd like to add an extension to. 2  Tap the phone number you'd like to edit and the dial pad should pop up like the picture below.3  After you've entered the regular phone number, tap the +*# key. Open your iPhone address book and click edit on the contact you'd like to add an extension to. 2  Tap the phone number you'd like to edit and the dial pad should pop up like the picture below.