1. A network system for providing one or more notification messages associated with an end-user device, the network system comprising: a first set of one or more elements configured to: obtain a first notification policy comprising a first trigger condition and an associated first notification message, the first trigger condition specifying a condition associated with one or more attempted or successful end-user device activities over a wireless access network, the first notification message comprising notification information to be presented through a user interface, based on the first trigger condition, determine one or more trigger identification instructions, the one or more trigger identification instructions configured to assist a second set of one or more elements in identifying when the first trigger condition occurs, the second set of one or more elements being responsible for monitoring service usage over the wireless access network associated with the end-user device, communicate the one or more trigger identification instructions to the second set of one or more elements, receive a trigger condition indication from the second set of one or more elements, the trigger condition indication indicating that the first trigger condition has occurred, and at least assist in presenting the notification information through the user interface; and a communicate interface enabling the first set of one or more elements to communicate with the second set of one or more elements.