AT&T Z812 User Manual page 34

Also vibrate for calls Check this option to enable vibration when
Quick responses
Vibrate pattern
Call
settings
34
Dialpad tones
Voicemail
Fixed Dialing
Numbers
Check this option to enable the phone dial
pad sound.
the phone is ringing.
Edit the text message that you can send to
the caller while rejecting his/her call.
Select the vibration pattern for incoming
calls.
Select a voicemail service provider
(your carrier is the default), or edit
the voicemail number if necessary.
Restrict outgoing calls to a fixed set of
numbers. To do this you must know your
micro-SIM's PIN2 code. Not all carriers
support this functionality.
Phone Calls