diff --git a/src/com/android/settings/network/telephony/MobileNetworkEidPreferenceController.kt b/src/com/android/settings/network/telephony/MobileNetworkEidPreferenceController.kt
index 907bab1..1e635a5 100644
--- a/src/com/android/settings/network/telephony/MobileNetworkEidPreferenceController.kt
+++ b/src/com/android/settings/network/telephony/MobileNetworkEidPreferenceController.kt
@@ -84,6 +84,13 @@
     }
 
     override fun onViewCreated(viewLifecycleOwner: LifecycleOwner) {
+        if (!this::lazyViewModel.isInitialized) {
+            Log.e(
+                this.javaClass.simpleName,
+                "lateinit property lazyViewModel has not been initialized"
+            )
+            return
+        }
         preference.isVisible = false
 
         val viewModel by lazyViewModel
diff --git a/src/com/android/settings/network/telephony/MobileNetworkImeiPreferenceController.kt b/src/com/android/settings/network/telephony/MobileNetworkImeiPreferenceController.kt
index 8ec313b..e134681 100644
--- a/src/com/android/settings/network/telephony/MobileNetworkImeiPreferenceController.kt
+++ b/src/com/android/settings/network/telephony/MobileNetworkImeiPreferenceController.kt
@@ -78,6 +78,13 @@
     }
 
     override fun onViewCreated(viewLifecycleOwner: LifecycleOwner) {
+        if (!this::lazyViewModel.isInitialized) {
+            Log.e(
+                this.javaClass.simpleName,
+                "lateinit property lazyViewModel has not been initialized"
+            )
+            return
+        }
         val viewModel by lazyViewModel
         val coroutineScope = viewLifecycleOwner.lifecycleScope
 
diff --git a/src/com/android/settings/network/telephony/MobileNetworkPhoneNumberPreferenceController.kt b/src/com/android/settings/network/telephony/MobileNetworkPhoneNumberPreferenceController.kt
index 65a4b7e..10a8b53 100644
--- a/src/com/android/settings/network/telephony/MobileNetworkPhoneNumberPreferenceController.kt
+++ b/src/com/android/settings/network/telephony/MobileNetworkPhoneNumberPreferenceController.kt
@@ -19,6 +19,7 @@
 import android.content.Context
 import android.telephony.SubscriptionInfo
 import android.telephony.SubscriptionManager
+import android.util.Log
 import androidx.annotation.VisibleForTesting
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.viewModels
@@ -66,6 +67,13 @@
     }
 
     override fun onViewCreated(viewLifecycleOwner: LifecycleOwner) {
+        if (!this::lazyViewModel.isInitialized) {
+            Log.e(
+                this.javaClass.simpleName,
+                "lateinit property lazyViewModel has not been initialized"
+            )
+            return
+        }
         val viewModel by lazyViewModel
         val coroutineScope = viewLifecycleOwner.lifecycleScope
 
diff --git a/src/com/android/settings/network/telephony/MobileNetworkSpnPreferenceController.kt b/src/com/android/settings/network/telephony/MobileNetworkSpnPreferenceController.kt
index ac055b0..4736eb7 100644
--- a/src/com/android/settings/network/telephony/MobileNetworkSpnPreferenceController.kt
+++ b/src/com/android/settings/network/telephony/MobileNetworkSpnPreferenceController.kt
@@ -19,6 +19,7 @@
 import android.content.Context
 import android.telephony.SubscriptionInfo
 import android.telephony.SubscriptionManager
+import android.util.Log
 import androidx.annotation.VisibleForTesting
 import androidx.fragment.app.Fragment
 import androidx.fragment.app.viewModels
@@ -26,6 +27,7 @@
 import androidx.preference.Preference
 import androidx.preference.PreferenceScreen
 import com.android.settings.flags.Flags
+import com.android.settings.network.SimOnboardingActivity
 import com.android.settings.network.SubscriptionInfoListViewModel
 import com.android.settingslib.spa.framework.util.collectLatestWithLifecycle
 
@@ -57,6 +59,14 @@
     }
 
     override fun onViewCreated(viewLifecycleOwner: LifecycleOwner) {
+        if (!this::lazyViewModel.isInitialized) {
+            Log.e(
+                this.javaClass.simpleName,
+                "lateinit property lazyViewModel has not been initialized"
+            )
+            return
+        }
+
         val viewModel by lazyViewModel
 
         viewModel.subscriptionInfoListFlow
diff --git a/src/com/android/settings/network/telephony/WifiCallingPreferenceController.kt b/src/com/android/settings/network/telephony/WifiCallingPreferenceController.kt
index 0ee1d87..f184092 100644
--- a/src/com/android/settings/network/telephony/WifiCallingPreferenceController.kt
+++ b/src/com/android/settings/network/telephony/WifiCallingPreferenceController.kt
@@ -22,6 +22,7 @@
 import android.telephony.SubscriptionManager
 import android.telephony.TelephonyManager
 import android.telephony.ims.ImsMmTelManager
+import android.util.Log
 import androidx.lifecycle.LifecycleOwner
 import androidx.preference.Preference
 import androidx.preference.PreferenceScreen
@@ -76,6 +77,13 @@
     }
 
     override fun onViewCreated(viewLifecycleOwner: LifecycleOwner) {
+        if(mSubId == SubscriptionManager.INVALID_SUBSCRIPTION_ID){
+            Log.e(
+                this.javaClass.simpleName,
+                "mSubId is INVALID_SUBSCRIPTION_ID"
+            )
+            return
+        }
         wifiCallingRepositoryFactory(mSubId).wifiCallingReadyFlow()
             .collectLatestWithLifecycle(viewLifecycleOwner) { isReady ->
                 preference.isVisible = isReady
diff --git a/src/com/android/settings/network/telephony/gsm/AutoSelectPreferenceController.kt b/src/com/android/settings/network/telephony/gsm/AutoSelectPreferenceController.kt
index d709574..67a2356 100644
--- a/src/com/android/settings/network/telephony/gsm/AutoSelectPreferenceController.kt
+++ b/src/com/android/settings/network/telephony/gsm/AutoSelectPreferenceController.kt
@@ -23,6 +23,7 @@
 import android.provider.Settings
 import android.telephony.CarrierConfigManager
 import android.telephony.ServiceState
+import android.telephony.SubscriptionManager
 import android.telephony.TelephonyManager
 import androidx.annotation.VisibleForTesting
 import androidx.compose.runtime.Composable
@@ -80,7 +81,7 @@
     @VisibleForTesting
     var progressDialog: ProgressDialog? = null
 
-    private var subId by notNull<Int>()
+    private var subId = SubscriptionManager.INVALID_SUBSCRIPTION_ID
 
     /**
      * Initialization based on given subscription id.