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Spec	Title	Releases	WG
21.202	Technical Specifications and Technical Reports relating to the Common IP Multimedia Subsystem (IMS)	18.0.0 17.0.0 16.0.0 15.0.0 14.1.0 13.0.0 12.0.0 11.0.1 10.3.1 9.3.0 8.5.0	SP

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