A network service provider computer remotely overrides and controls user notification settings of a mobile communications device by establishing one or more authentication keys by a server computer for a specific mobile communication device; transmitting the one or more authentication keys to the specific mobile communication device to establish a trusted relationship; responsive to an event or signal requiring overriding of user notification settings, preparing a notification control message including at least one notification control parameter; and transmitting to the specific mobile communications device the notification control message to cause it to implement and override one or more user notification settings according to the at least one notification control parameter.