diff --git a/packages/SystemUI/src/com/android/systemui/statusbar/policy/MobileSignalController.java b/packages/SystemUI/src/com/android/systemui/statusbar/policy/MobileSignalController.java
index 3490e1567ea81..0f67ee078c816 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/policy/MobileSignalController.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/policy/MobileSignalController.java
@@ -108,8 +108,6 @@ public class MobileSignalController extends SignalController<MobileState, Mobile
     private Config mConfig;
     @VisibleForTesting
     boolean mInflateSignalStrengths = false;
-    private MobileStatusTracker.Callback mCallback;
-    private RegistrationCallback mRegistrationCallback;
     private int mLastWwanLevel;
     private int mLastWlanLevel;
     private int mLastWlanCrossSimLevel;
@@ -121,6 +119,82 @@ public class MobileSignalController extends SignalController<MobileState, Mobile
     // Where to copy the next state into.
     private int mMobileStatusHistoryIndex;
 
+    private final MobileStatusTracker.Callback mMobileCallback =
+            new MobileStatusTracker.Callback() {
+                private String mLastStatus;
+
+                @Override
+                public void onMobileStatusChanged(boolean updateTelephony,
+                        MobileStatus mobileStatus) {
+                    if (Log.isLoggable(mTag, Log.DEBUG)) {
+                        Log.d(mTag, "onMobileStatusChanged="
+                                + " updateTelephony=" + updateTelephony
+                                + " mobileStatus=" + mobileStatus.toString());
+                    }
+                    String currentStatus = mobileStatus.toString();
+                    if (!currentStatus.equals(mLastStatus)) {
+                        mLastStatus = currentStatus;
+                        String status = new StringBuilder()
+                                .append(SSDF.format(System.currentTimeMillis())).append(",")
+                                .append(currentStatus)
+                                .toString();
+                        recordLastMobileStatus(status);
+                    }
+                    updateMobileStatus(mobileStatus);
+                    if (updateTelephony) {
+                        updateTelephony();
+                    } else {
+                        notifyListenersIfNecessary();
+                    }
+                }
+            };
+
+    private final RegistrationCallback mRegistrationCallback = new RegistrationCallback() {
+        @Override
+        public void onRegistered(ImsRegistrationAttributes attributes) {
+            Log.d(mTag, "onRegistered: " + "attributes=" + attributes);
+            int imsTransportType = attributes.getTransportType();
+            int registrationAttributes = attributes.getAttributeFlags();
+            if (imsTransportType == AccessNetworkConstants.TRANSPORT_TYPE_WWAN) {
+                mImsType = IMS_TYPE_WWAN;
+                IconState statusIcon = new IconState(
+                        true,
+                        getCallStrengthIcon(mLastWwanLevel, /* isWifi= */false),
+                        getCallStrengthDescription(mLastWwanLevel, /* isWifi= */false));
+                notifyCallStateChange(statusIcon, mSubscriptionInfo.getSubscriptionId());
+            } else if (imsTransportType == AccessNetworkConstants.TRANSPORT_TYPE_WLAN) {
+                if (registrationAttributes == 0) {
+                    mImsType = IMS_TYPE_WLAN;
+                    IconState statusIcon = new IconState(
+                            true,
+                            getCallStrengthIcon(mLastWlanLevel, /* isWifi= */true),
+                            getCallStrengthDescription(mLastWlanLevel, /* isWifi= */true));
+                    notifyCallStateChange(statusIcon, mSubscriptionInfo.getSubscriptionId());
+                } else if (registrationAttributes
+                        == ImsRegistrationAttributes.ATTR_EPDG_OVER_CELL_INTERNET) {
+                    mImsType = IMS_TYPE_WLAN_CROSS_SIM;
+                    IconState statusIcon = new IconState(
+                            true,
+                            getCallStrengthIcon(mLastWlanCrossSimLevel, /* isWifi= */false),
+                            getCallStrengthDescription(
+                                    mLastWlanCrossSimLevel, /* isWifi= */false));
+                    notifyCallStateChange(statusIcon, mSubscriptionInfo.getSubscriptionId());
+                }
+            }
+        }
+
+        @Override
+        public void onUnregistered(ImsReasonInfo info) {
+            Log.d(mTag, "onDeregistered: " + "info=" + info);
+            mImsType = IMS_TYPE_WWAN;
+            IconState statusIcon = new IconState(
+                    true,
+                    getCallStrengthIcon(mLastWwanLevel, /* isWifi= */false),
+                    getCallStrengthDescription(mLastWwanLevel, /* isWifi= */false));
+            notifyCallStateChange(statusIcon, mSubscriptionInfo.getSubscriptionId());
+        }
+    };
+
     // TODO: Reduce number of vars passed in, if we have the NetworkController, probably don't
     // need listener lists anymore.
     public MobileSignalController(
@@ -144,8 +218,8 @@ public class MobileSignalController extends SignalController<MobileState, Mobile
         mPhone = phone;
         mDefaults = defaults;
         mSubscriptionInfo = info;
-        mNetworkNameSeparator = getTextIfExists(R.string.status_bar_network_name_separator)
-                .toString();
+        mNetworkNameSeparator = getTextIfExists(
+                R.string.status_bar_network_name_separator).toString();
         mNetworkNameDefault = getTextIfExists(
                 com.android.internal.R.string.lockscreen_carrier_default).toString();
         mReceiverHandler = new Handler(receiverLooper);
@@ -165,83 +239,9 @@ public class MobileSignalController extends SignalController<MobileState, Mobile
                 updateTelephony();
             }
         };
-        mCallback = new MobileStatusTracker.Callback() {
-            private String mLastStatus;
-
-            @Override
-            public void onMobileStatusChanged(boolean updateTelephony,
-                    MobileStatus mobileStatus) {
-                if (Log.isLoggable(mTag, Log.DEBUG)) {
-                    Log.d(mTag, "onMobileStatusChanged="
-                            + " updateTelephony=" + updateTelephony
-                            + " mobileStatus=" + mobileStatus.toString());
-                }
-                String currentStatus = mobileStatus.toString();
-                if (!currentStatus.equals(mLastStatus)) {
-                    mLastStatus = currentStatus;
-                    String status = new StringBuilder()
-                            .append(SSDF.format(System.currentTimeMillis())).append(",")
-                            .append(currentStatus)
-                            .toString();
-                    recordLastMobileStatus(status);
-                }
-                updateMobileStatus(mobileStatus);
-                if (updateTelephony) {
-                    updateTelephony();
-                } else {
-                    notifyListenersIfNecessary();
-                }
-            }
-        };
-
-        mRegistrationCallback = new RegistrationCallback() {
-            @Override
-            public void onRegistered(ImsRegistrationAttributes attributes) {
-                Log.d(mTag, "onRegistered: " + "attributes=" + attributes);
-                int imsTransportType = attributes.getTransportType();
-                int registrationAttributes = attributes.getAttributeFlags();
-                if (imsTransportType == AccessNetworkConstants.TRANSPORT_TYPE_WWAN) {
-                    mImsType = IMS_TYPE_WWAN;
-                    IconState statusIcon = new IconState(
-                            true,
-                            getCallStrengthIcon(mLastWwanLevel, /* isWifi= */false),
-                            getCallStrengthDescription(mLastWwanLevel, /* isWifi= */false));
-                    notifyCallStateChange(statusIcon, mSubscriptionInfo.getSubscriptionId());
-                } else if (imsTransportType == AccessNetworkConstants.TRANSPORT_TYPE_WLAN) {
-                    if (registrationAttributes == 0) {
-                        mImsType = IMS_TYPE_WLAN;
-                        IconState statusIcon = new IconState(
-                                true,
-                                getCallStrengthIcon(mLastWlanLevel, /* isWifi= */true),
-                                getCallStrengthDescription(mLastWlanLevel, /* isWifi= */true));
-                        notifyCallStateChange(statusIcon, mSubscriptionInfo.getSubscriptionId());
-                    } else if (registrationAttributes
-                            == ImsRegistrationAttributes.ATTR_EPDG_OVER_CELL_INTERNET) {
-                        mImsType = IMS_TYPE_WLAN_CROSS_SIM;
-                        IconState statusIcon = new IconState(
-                                true,
-                                getCallStrengthIcon(mLastWlanCrossSimLevel, /* isWifi= */false),
-                                getCallStrengthDescription(
-                                        mLastWlanCrossSimLevel, /* isWifi= */false));
-                        notifyCallStateChange(statusIcon, mSubscriptionInfo.getSubscriptionId());
-                    }
-                }
-            }
-
-            @Override
-            public void onUnregistered(ImsReasonInfo info) {
-                Log.d(mTag, "onDeregistered: " + "info=" + info);
-                mImsType = IMS_TYPE_WWAN;
-                IconState statusIcon = new IconState(
-                        true,
-                        getCallStrengthIcon(mLastWwanLevel, /* isWifi= */false),
-                        getCallStrengthDescription(mLastWwanLevel, /* isWifi= */false));
-                notifyCallStateChange(statusIcon, mSubscriptionInfo.getSubscriptionId());
-            }
-        };
         mImsMmTelManager = ImsMmTelManager.createForSubscriptionId(info.getSubscriptionId());
         mMobileStatusTracker = new MobileStatusTracker(mPhone, receiverLooper,
-                info, mDefaults, mCallback);
+                info, mDefaults, mMobileCallback);
         mProviderModelBehavior = featureFlags.isCombinedStatusBarSignalIconsEnabled();
         mProviderModelSetting = featureFlags.isProviderModelSettingEnabled();
     }