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Spec	Title	Releases	WG
23.218	IP Multimedia (IM) session handling; IM call model; Stage 2	18.0.0 17.0.0 16.0.0 15.0.0 14.0.0 13.0.0 12.3.0 11.6.0 10.0.0 9.2.0 8.6.0 7.10.0 6.4.0 5.9.0	C1

All information on this page is aggregated from the 3GPP Specfication Status Report page.