The network sends this cause when the UE requests disaster roaming for a determined PLMN with disaster condition but the AMF does not support providing it.
Our summary of the spec text quoted below.
1What the spec says
Name in the cause table
Disaster roaming for the determined PLMN with disaster condition not allowed
This 5GMM cause is sent by the network in a PLMN where the UE has requested registration for disaster roaming service for the determined PLMN with disaster condition, but the AMF determines that it does not support providing disaster roaming services to the UE for the determined PLMN with disaster [...]
3GPP Scout built this page from TS 24.501 V20.1.0 as indexed on 2026-10-15. The quotes are copied from the spec, and code checks each one against the stored text and the 3GPP archive file before publishing. The plain-words line was written by an AI model (GPT-6 Sol) and checked against the quotes by a second AI model from another company (Claude Opus 5.5). The official 3GPP text governs.