diff --git a/src/com/android/phone/settings/RadioInfo.java b/src/com/android/phone/settings/RadioInfo.java
index 124badf..59ff11d 100644
--- a/src/com/android/phone/settings/RadioInfo.java
+++ b/src/com/android/phone/settings/RadioInfo.java
@@ -207,6 +207,7 @@
     private static final int EVENT_QUERY_SMSC_DONE = 1005;
     private static final int EVENT_UPDATE_SMSC_DONE = 1006;
     private static final int EVENT_PHYSICAL_CHANNEL_CONFIG_CHANGED = 1007;
+    private static final int EVENT_UPDATE_NR_STATS = 1008;
 
     private static final int MENU_ITEM_VIEW_ADN            = 1;
     private static final int MENU_ITEM_VIEW_FDN            = 2;
@@ -379,7 +380,14 @@
             updateNetworkType();
             updateRawRegistrationState(serviceState);
             updateImsProvisionedState();
-            updateNrStats(serviceState);
+
+            // Since update NR stats includes a ril message to get slicing information, it runs
+            // as blocking during the timeout period of 1 second. if ServiceStateChanged event
+            // fires consecutively, RadioInfo can run for more than 10 seconds. This can cause ANR.
+            // Therefore, send event only when there is no same event being processed.
+            if (!mHandler.hasMessages(EVENT_UPDATE_NR_STATS)) {
+                mHandler.obtainMessage(EVENT_UPDATE_NR_STATS).sendToTarget();
+            }
         }
 
         @Override
@@ -465,6 +473,10 @@
                     }
                     updatePhysicalChannelConfiguration((List<PhysicalChannelConfig>) ar.result);
                     break;
+                case EVENT_UPDATE_NR_STATS:
+                    log("got EVENT_UPDATE_NR_STATS");
+                    updateNrStats();
+                    break;
                 default:
                     super.handleMessage(msg);
                     break;
@@ -690,7 +702,7 @@
         updateProperties();
         updateDnsCheckState();
         updateNetworkType();
-        updateNrStats(null);
+        updateNrStats();
 
         updateCellInfo(mCellInfoResult);
         updateSubscriptionIds();
@@ -1235,15 +1247,12 @@
                     AccessNetworkConstants.TRANSPORT_TYPE_WLAN));
     }
 
-    private void updateNrStats(ServiceState serviceState) {
+    private void updateNrStats() {
         if ((mTelephonyManager.getSupportedRadioAccessFamily()
                 & TelephonyManager.NETWORK_TYPE_BITMASK_NR) == 0) {
             return;
         }
-        ServiceState ss = serviceState;
-        if (ss == null && mPhone != null) {
-            ss = mPhone.getServiceState();
-        }
+        ServiceState ss = (mPhone == null) ? null : mPhone.getServiceState();
         if (ss != null) {
             NetworkRegistrationInfo nri = ss.getNetworkRegistrationInfo(
                     NetworkRegistrationInfo.DOMAIN_PS, AccessNetworkConstants.TRANSPORT_TYPE_WWAN);
@@ -1257,6 +1266,13 @@
             }
             mNrState.setText(NetworkRegistrationInfo.nrStateToString(ss.getNrState()));
             mNrFrequency.setText(ServiceState.frequencyRangeToString(ss.getNrFrequencyRange()));
+        } else {
+            Log.e(TAG, "Clear Nr stats by null service state");
+            mEndcAvailable.setText("");
+            mDcnrRestricted.setText("");
+            mNrAvailable.setText("");
+            mNrState.setText("");
+            mNrFrequency.setText("");
         }
 
         CompletableFuture<NetworkSlicingConfig> resultFuture = new CompletableFuture<>();