UE shall include the DEVICE_IDENTITY Notify payload
As defined in TS 24.302 clause 7.2.6, if the UE:
- receives IKE_AUTH response message from ePDG containing a Notify payload with the DEVICE_IDENTITY Notify Message Type and the Identity Type field of the DEVICE_IDENTITY Notify payload is set to either 'IMEI' or 'IMEISV' and the Identity Value field is empty;
- successfully authenticates the network or requests emergency session; and
- has Mobile Equipment Identity IMEI or IMEISV available,
the UE shall include the DEVICE_IDENTITY Notify payload in the new IKE_AUTH request message.
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