A wireless multiple-access communications system may provide various types of wireless communication content such as voice, video, messaging, etc. The wireless multiple-access communications system may be a public land mobile network (PLMN). The PLMN may support various radio access technologies (RATs), for example, fourth generation (4G), such as Long-Term Evolution (LTE), LTE-Advanced (LTE-A) or LTE-A Pro system. The PLMN may also include network devices, such as a mobility management entity (MME), a serving gateway, a packet data network, etc. Each of these network devices may support communication for a communication device, which may be otherwise known as a user equipment (UE). The UE may be registered with a PLMN to receive the various types of wireless communication content. The UE may, in some examples, roam out of the PLMN and attempt to register with a roaming network (e.g., another PLMN) via a registration procedure (e.g., an attach procedure), to continue receiving the various types of wireless communication content.
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Chuang, Poying and Huang, Arthur, "Handling Reject Cause on Roaming Network", Technical Disclosure Commons, (April 10, 2020)