The present disclosure provides methods and apparatuses related to mobile network systems. In an implementation, a method comprises configuring, by an application function (AF) of an apparatus in a mobile network system, a policy control function (PCF) to provide a plurality of Quality of Service (QoS) levels for a session related to an application or a service; and requesting, by the AF, the PCF to configure the plurality of QoS levels, wherein a QoS flow is associated with a plurality of QoS profiles for configuring the plurality of QoS levels in response to the QoS flow being established.