A method performed by an application function, AF, for a communication network, wherein the AF has been informed, in a first notification, about an out-of-credit event associated with a user of a service provided by the AF, the method comprising sending subscription request, to a network function, NF, for requesting notifications about reallocation-of-credit events associated with one or more users of a service provided by the AF; receiving, from the NF, a second notification of a reallocation-of-credit event associated with the user of the service provided by the AF for which the AF has been informed about the out-of-credit event, such that the AF can perform one or more second actions with respect to the service.

A method, apparatus and system for routing a communication in a communication system between a first participant device, on an Internet Protocol (IP) network, associated with a first participant, and a second participant device associated with a second participant. The method comprises receiving a second participant identifier associated with the second participant device, causing the at least one processor to access a user profile that is specific to the first participant and associated with a plurality of first participant attributes, comparing the second participant and at least one first participant attribute and identifying whether at least one route exists, producing route information to an Internet Protocol (IP) address on a first communication network or associated with a gateway to the second communication network, and establishing the communication to the second participant. At least one of the networks may utilize Public Switched Telephone Network (PSTN) compatible numbers for identifying a route for the communication.

Embodiments include methods performed by an application function (AF) for a 5G communication network. Such methods include sending, to a Policy Control Function (PCF), a subscription request for notifications about out-of-credit events and reallocation-of-credit events associated with one or more users of a service provided by the AF. Such methods include receiving, from the PCF, a first notification that indicates the following: an out-of-credit event associated with a first one of the users of the service provided by the AF, and one or more actions performed by the 5G communication network in response to the out-of-credit event. Such methods include subsequently receiving, from the PCF, a second notification that indicates a reallocation-of-credit event associated with the first user of the service provided by the AF. The reallocation-of-credit event is credit of the first user having been refilled, replenished, and/or reallocated. Other embodiments include complementary methods for a PCF.