Turn emergency alerts types on or off and set alert reminder. These are the settings associated with Commercial Mobile Alert System.
Presidential alert: This setting allows presidential alert to be always presented. This setting is greyed-out because it cannot be changed.
Extreme alert: Checkmark this setting so that you will always be notified of an Extreme alert.
Severe alert: Checkmark this setting so that you will always be notified of a Severe alert.
AMBER alert: Checkmark this setting so that you will always be notified of an AMBER alert.
Alert reminder: Tap to set how often you want to be reminded when notified of an alert.