diff --git a/packages/SystemUI/src/com/android/keyguard/KeyguardUpdateMonitor.java b/packages/SystemUI/src/com/android/keyguard/KeyguardUpdateMonitor.java
index d370bc7e81c2a..074eb74d3ea96 100644
--- a/packages/SystemUI/src/com/android/keyguard/KeyguardUpdateMonitor.java
+++ b/packages/SystemUI/src/com/android/keyguard/KeyguardUpdateMonitor.java
@@ -3670,7 +3670,8 @@ public class KeyguardUpdateMonitor implements TrustManager.TrustListener, Dumpab
         mLogger.logSimState(subId, slotId, state);
 
         boolean becameAbsent = false;
-        if (!SubscriptionManager.isValidSubscriptionId(subId)) {
+        if (!SubscriptionManager.isValidSubscriptionId(subId)
+                && state != TelephonyManager.SIM_STATE_UNKNOWN) {
             mLogger.w("invalid subId in handleSimStateChange()");
             /* Only handle No SIM(ABSENT) and Card Error(CARD_IO_ERROR) due to
              * handleServiceStateChange() handle other case */
@@ -3705,7 +3706,7 @@ public class KeyguardUpdateMonitor implements TrustManager.TrustListener, Dumpab
             data.subId = subId;
             data.slotId = slotId;
         }
-        if ((changed || becameAbsent) && state != TelephonyManager.SIM_STATE_UNKNOWN) {
+        if ((changed || becameAbsent) || state == TelephonyManager.SIM_STATE_UNKNOWN) {
             for (int i = 0; i < mCallbacks.size(); i++) {
                 KeyguardUpdateMonitorCallback cb = mCallbacks.get(i).get();
                 if (cb != null) {
diff --git a/packages/SystemUI/src/com/android/systemui/keyguard/KeyguardViewMediator.java b/packages/SystemUI/src/com/android/systemui/keyguard/KeyguardViewMediator.java
index 69f4efbfc714d..15164c50f6991 100644
--- a/packages/SystemUI/src/com/android/systemui/keyguard/KeyguardViewMediator.java
+++ b/packages/SystemUI/src/com/android/systemui/keyguard/KeyguardViewMediator.java
@@ -704,6 +704,9 @@ public class KeyguardViewMediator implements CoreStartable, Dumpable,
                         }
                     }
                     break;
+                case TelephonyManager.SIM_STATE_UNKNOWN:
+                    mPendingPinLock = false;
+                    break;
                 default:
                     if (DEBUG_SIM_STATES) Log.v(TAG, "Unspecific state: " + simState);
                     break;
diff --git a/packages/SystemUI/tests/src/com/android/keyguard/KeyguardUpdateMonitorTest.java b/packages/SystemUI/tests/src/com/android/keyguard/KeyguardUpdateMonitorTest.java
index 2ff30a6a50658..0edfd77f27032 100644
--- a/packages/SystemUI/tests/src/com/android/keyguard/KeyguardUpdateMonitorTest.java
+++ b/packages/SystemUI/tests/src/com/android/keyguard/KeyguardUpdateMonitorTest.java
@@ -2822,6 +2822,16 @@ public class KeyguardUpdateMonitorTest extends SysuiTestCase {
         );
     }
 
+    @Test
+    public void testOnSimStateChanged_Unknown() {
+        KeyguardUpdateMonitorCallback keyguardUpdateMonitorCallback = spy(
+                KeyguardUpdateMonitorCallback.class);
+        mKeyguardUpdateMonitor.registerCallback(keyguardUpdateMonitorCallback);
+        mKeyguardUpdateMonitor.handleSimStateChange(-1, 0, TelephonyManager.SIM_STATE_UNKNOWN);
+        verify(keyguardUpdateMonitorCallback).onSimStateChanged(-1, 0,
+                TelephonyManager.SIM_STATE_UNKNOWN);
+    }
+
     private void verifyFingerprintAuthenticateNeverCalled() {
         verify(mFingerprintManager, never()).authenticate(any(), any(), any(), any(), any());
         verify(mFingerprintManager, never()).authenticate(any(), any(), any(), any(), anyInt(),