diff --git a/configuration/config_simapp.rst b/configuration/config_simapp.rst
index 0828d6b..452f459 100644
--- a/configuration/config_simapp.rst
+++ b/configuration/config_simapp.rst
@@ -23,8 +23,8 @@
               addr: config4g
               port: 5000
             subscribers:
-            - ueId-start: 208014567891201
-              ueId-end: 208014567891211
+            - ueId-start: "208014567891201"
+              ueId-end: "208014567891205"
               plmnId: 20801
               opc: "d4416644f6154936193433dd20a0ace0"
               op: ""
@@ -35,6 +35,9 @@
               imsis:
                 - "208014567891201"
                 - "208014567891202"
+                - "208014567891203"
+                - "208014567891204"
+                - "208014567891205"
               ip-domain-name: "pool1"
               ip-domain-expanded:
                 dnn: internet
@@ -70,17 +73,6 @@
                 upf:
                   upf-name: "upf"
                   upf-port: 8805
-              application-filtering-rules:
-                - rule-name: “rule-1”
-                 priority: 5
-                 action : permit
-                 endpoint: "10.91.1.3"
-                 traffic-class:
-                   name: “platinum”
-                   qci: 9
-                   arp: 125
-                   pdb: 300
-                   pelr: 6
 
 .. note::
     Simapp takes initial configuration through helm chart. Above yaml files is initial config.
@@ -88,7 +80,265 @@
 
 Configuration Modification through Simapp interface
 ---------------------------------------------------
-If simapp is already running then ``kubectl edit configmap simapp -n <namespace>`` can be used to update
-the simapp configuration. Simapp handles config delete, modify & addition by watching configmap
-for any changes. There is no need to restart simapp after configmap change. New config will be automatically
-reloaded and updated configuration is passed to SD-Core.
+
+Adding new subscribers
+"""""""""""""""""""""""
+
+If 5G core is already started and subscriber needs to be added in the 5G-Core then do the following,
+
+Run the command -  ``kubectl edit configmap simapp -n <namespace>`` and update subscribers section.
+Once config is updated then save the
+file and exit from the file. Subscribers will get added within 60 seconds. In below we are updating
+ueId-end from 208014567891205 to 208014567891210. This will add 5 new subscribers.
+
+.. code-block::
+
+  config:
+    simapp:
+      cfgFiles:
+        simapp.yaml:
+          configuration:
+            provision-network-slice: true
+            sub-provision-endpt:
+              addr: config4g
+              port: 5000
+            subscribers:
+            - ueId-start: "208014567891201"
+              ueId-end: "208014567891210"
+              plmnId: 20801
+              opc: "d4416644f6154936193433dd20a0ace0"
+              op: ""
+              key: "465b5ce8b199b49faa5f0a2ee238a6bc"
+              sequenceNumber: 96
+            device-groups:
+            - name:  "4g-oaisim-user"
+              imsis:
+                - "208014567891201"
+                - "208014567891202"
+                - "208014567891203"
+                - "208014567891204"
+                - "208014567891205"
+                - "208014567891206"
+                - "208014567891207"
+                - "208014567891208"
+                - "208014567891209"
+                - "208014567891210"
+              ip-domain-name: "pool1"
+              ip-domain-expanded:
+                dnn: internet
+                dns-primary: "8.8.8.8"
+                mtu: 1460
+                ue-ip-pool: "172.250.0.0/16"
+                ue-dnn-qos:
+                  dnn-mbr-downlink: 20000000
+                  dnn-mbr-uplink: 4000000
+                  bitrate-unit: bps
+                  traffic-class:  #default bearer QCI/ARP
+                    name: "platinum"
+                    qci: 9
+                    arp: 1
+                    pdb: 300
+                    pelr: 6
+              site-info: "aiab"
+            network-slices:
+            - name: "default"
+              slice-id:
+                sd: "010203"
+                sst: 1
+              site-device-group:
+              - "4g-oaisim-user"
+              site-info:
+                gNodeBs:
+                - name: "aiab-gnb1"
+                  tac: 1
+                plmn:
+                  mcc: "208"
+                  mnc: "01"
+                site-name: "aiab"
+                upf:
+                  upf-name: "upf"
+                  upf-port: 8805
+
+.. note::
+        There is no need to restart simapp after configmap change. New config will be automatically
+        reloaded and updated configuration is passed to SD-Core.
+
+Deleting subscribers
+""""""""""""""""""""
+
+If 5G core is already started and subscriber needs to be removed in the 5G-Core then do the following,
+
+Run the command -  ``kubectl edit configmap simapp -n <namespace>`` and update subscribers section.
+Once config is updated then save the file and exit from the file. Subscribers will get added within
+60 seconds. In below we are updating ueId-end from 208014567891210 to 208014567891208. This will
+remove 2 subscribers from 5G core.
+
+.. code-block::
+
+  config:
+    simapp:
+      cfgFiles:
+        simapp.yaml:
+          configuration:
+            provision-network-slice: true
+            sub-provision-endpt:
+              addr: config4g
+              port: 5000
+            subscribers:
+            - ueId-start: "208014567891201"
+              ueId-end: "208014567891208"
+              plmnId: 20801
+              opc: "d4416644f6154936193433dd20a0ace0"
+              op: ""
+              key: "465b5ce8b199b49faa5f0a2ee238a6bc"
+              sequenceNumber: 96
+            device-groups:
+            - name:  "4g-oaisim-user"
+              imsis:
+                - "208014567891201"
+                - "208014567891202"
+                - "208014567891203"
+                - "208014567891204"
+                - "208014567891205"
+                - "208014567891206"
+                - "208014567891207"
+                - "208014567891208"
+              ip-domain-name: "pool1"
+              ip-domain-expanded:
+                dnn: internet
+                dns-primary: "8.8.8.8"
+                mtu: 1460
+                ue-ip-pool: "172.250.0.0/16"
+                ue-dnn-qos:
+                  dnn-mbr-downlink: 20000000
+                  dnn-mbr-uplink: 4000000
+                  bitrate-unit: bps
+                  traffic-class:  #default bearer QCI/ARP
+                    name: "platinum"
+                    qci: 9
+                    arp: 1
+                    pdb: 300
+                    pelr: 6
+              site-info: "aiab"
+            network-slices:
+            - name: "default"
+              slice-id:
+                sd: "010203"
+                sst: 1
+              site-device-group:
+              - "4g-oaisim-user"
+              site-info:
+                gNodeBs:
+                - name: "aiab-gnb1"
+                  tac: 1
+                plmn:
+                  mcc: "208"
+                  mnc: "01"
+                site-name: "aiab"
+                upf:
+                  upf-name: "upf"
+                  upf-port: 8805
+
+Adding subscribers with multiple subscriber ranges
+"""""""""""""""""""""""""""""""""""""""""""""""""""""""""""
+
+If 5G core is already started and subscriber needs to be added in the 5G-Core then do the following,
+
+Run the command -  ``kubectl edit configmap simapp -n <namespace>`` and update subscribers section.
+Once config is updated then save the file and exit from the file. Subscribers will get added within 60 seconds.
+In below we are adding new subscriber range 208014567891216 to 208014567891220. This will add 5 new subscribers.
+If you have multiple ranges with different key & opc values then adding multiple subscriber blocks helps.
+
+
+.. code-block::
+
+  config:
+    simapp:
+      cfgFiles:
+        simapp.yaml:
+          configuration:
+            provision-network-slice: true
+            sub-provision-endpt:
+              addr: config4g
+              port: 5000
+            subscribers:
+            - ueId-start: "208014567891201"
+              ueId-end: "208014567891205"
+              plmnId: 20801
+              opc: "d4416644f6154936193433dd20a0ace0"
+              op: ""
+              key: "465b5ce8b199b49faa5f0a2ee238a6bc"
+              sequenceNumber: 96
+            - ueId-start: "208014567891216"
+              ueId-end: "208014567891220"
+              plmnId: 20801
+              opc: "d4416644f6154936193433dd20a0ace0"
+              op: ""
+              key: "465b5ce8b199b49faa5f0a2ee238a6bc"
+              sequenceNumber: 96
+            device-groups:
+            - name:  "4g-oaisim-user"
+              imsis:
+                - "208014567891201"
+                - "208014567891202"
+                - "208014567891203"
+                - "208014567891204"
+                - "208014567891205"
+                - "208014567891216"
+                - "208014567891217"
+                - "208014567891218"
+                - "208014567891219"
+                - "208014567891220"
+              ip-domain-name: "pool1"
+              ip-domain-expanded:
+                dnn: internet
+                dns-primary: "8.8.8.8"
+                mtu: 1460
+                ue-ip-pool: "172.250.0.0/16"
+                ue-dnn-qos:
+                  dnn-mbr-downlink: 20000000
+                  dnn-mbr-uplink: 4000000
+                  bitrate-unit: bps
+                  traffic-class:  #default bearer QCI/ARP
+                    name: "platinum"
+                    qci: 9
+                    arp: 1
+                    pdb: 300
+                    pelr: 6
+              site-info: "aiab"
+            network-slices:
+            - name: "default"
+              slice-id:
+                sd: "010203"
+                sst: 1
+              site-device-group:
+              - "4g-oaisim-user"
+              site-info:
+                gNodeBs:
+                - name: "aiab-gnb1"
+                  tac: 1
+                plmn:
+                  mcc: "208"
+                  mnc: "01"
+                site-name: "aiab"
+                upf:
+                  upf-name: "upf"
+                  upf-port: 8805
+
+Updating QoS Values for subscribers
+"""""""""""""""""""""""""""""""""""
+
+Run the command -  ``kubectl edit configmap simapp -n <namespace>`` and update QoS values mentioned in ip domain.
+Config snippet is provided below.
+
+.. code-block::
+
+                ue-dnn-qos:
+                  dnn-mbr-downlink: 20000000
+                  dnn-mbr-uplink: 4000000
+                  bitrate-unit: bps
+
+.. note::
+        If subscriber QoS is changed and if subscriber is already connected to the network then new values
+        are not used for already connected subscribers. To use new QoS rates, subscriber needs to be
+        disconnected and reconnected.
diff --git a/dict.txt b/dict.txt
index 15ff9ed..0dff146 100644
--- a/dict.txt
+++ b/dict.txt
@@ -85,6 +85,7 @@
 configs
 configurability
 dataplane
+de
 defaultAs
 deregistration
 dev
@@ -147,6 +148,7 @@
 omecproject
 onf
 onpremises
+opc
 opencord
 orchestrator
 patchset
@@ -194,6 +196,7 @@
 udr
 ue
 ue-dnn-qos
+ueId
 uerouting
 ul
 unsuffixed
diff --git a/release/upcoming.rst b/release/upcoming.rst
index 272960e..7c2766d 100644
--- a/release/upcoming.rst
+++ b/release/upcoming.rst
@@ -34,6 +34,7 @@
 
 - SMF supports - UE address allocation from UPF. This feature was already supported in 4G (SPGW). Now
   with new release, this feature will be part of 5G Core.
+- AMF API to de-register subscriber
 
 **gNBSim improvements to support**