diff --git a/overview/3gpp-compliance-4g.rst b/overview/3gpp-compliance-4g.rst
index 097e6ed..b9e1bfe 100644
--- a/overview/3gpp-compliance-4g.rst
+++ b/overview/3gpp-compliance-4g.rst
@@ -1,38 +1,85 @@
+.. _4g-compliance:
+
 4G - 3GPP Release Compliance
 ============================
 
+High Level Procedures Supported
+-------------------------------
+
+    - Initial UE Attach
+    - UE Detach
+    - S1 Release
+    - Service Request
+    - N/W initiated Detach
+    - Downlink Data Notification
+    - s1/x2 Handover for eNB change
+    - 5G-NSA related procedure support
+
+High Level Procedures/Functions Not Supported
+---------------------------------------------
+
+    - MME, SGW handover
+    - Indirect tunnel forwarding
+    - Roaming architecture
+    - Charging
+    - Lawful intercept
+    - IMS integration
+
 MME Compliance
 --------------
-* Interface support
+* Interface supported : NAS, s1ap, S6a, S11
 * Functions supported
+
+    - All the procedures mentioned above and following,
+    - Dedicated bearer handling
+    - s1ap interface management procedure
+    - S1 Context management procedures
+    - Subscriber management procedure on S6a interface
+
 * Functions not supported
 
+    - HSS modify/delete subscriber data
+
 SPGW Compliance
 ----------------
-* Interface support
-* Functions supported
+* Interface supported: Gx, Sxab
+* Functions supported: All the procedures mentioned above and following,
+
+    - PFCP Association management
+    - Control plane based UE address allocation
+    - User Plane based UE address allocation
+    - Receive and handle Usage Report sent by user plane
+
 * Functions not supported
 
 
 PCRF Compliance
 ----------------
-* Interface support
+* Interface supported: Gx
 * Functions supported
+
+    - Installing PCC rules for the subscribers
+    - Removal of Rules with timer trigger
+    - Removal of Gx Session with timer trigger
+
 * Functions not supported
 
+    - Charging functionality
+    - PCEF initiated Gx session update
+
 
 HSS Compliance
 ---------------
-* Interface support
+* Interface supported: S6a
 * Functions supported
+
+    - Subscriber management
+    - Authentication Vector generation
+    - Resynchronization of authentication vector
+    - Update Location procedure
+    - Purge Location procedure
+
 * Functions not supported
 
-SD Core High Level Features supported
--------------------------------------
-* UE Attach
-* UE Detach
-* Service Request
-* S1 Release
-* Downlink Data Notification
-* eNB s1 handover
-* eNB x2 handover
+    - Insert subscriber data runtime
+    - Delete Subscriber data runtime