1. A method, comprising:receiving a session management (SM) reject message by a user equipment (UE) in a mobile communication network, wherein the SM reject message comprises a cause code indicating that a maximum number of bearers has been reached while the UE has an existing number of established bearers connecting the UE with a first type of RAT;
determining the maximum number of bearers based on the SM reject message;
receiving a subsequent SM request from the network after receiving the SM reject message and the cause code, wherein the subsequent SM request is associated with a set of parameters including a second type of RAT different than the first type, and requests to activate a dedicated bearer context for a new bearer connecting the UE with the second type of RAT;
updating the maximum number of bearers based on the SM request and the set of parameters in response to the cause code, wherein the UE autonomously updates the maximum number of bearers that is radio access technology (RAT) dependent; and
accepting the subsequent SM request and establishing the new bearer while maintaining the existing number of established bearers.