Change text (SMS), picture (MMS), emergency, and AMBER alert settings.
INSTRUCTIONS & INFO
ACCESS MESSAGES SETTINGS: From the home screen, select the AT&T Messages app. Note: In order to access message settings, you must have already set up AT&T Messages.
Select the Menu icon,then select Settings.
Select the Notifications switch to turn Notifications on or off.
ADJUST NOTIFICATION ALERTS: When Notifications are enabled, you can set the Check for New Messages frequency. Select the desired option.