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 b6c7655..34a03bf 100644
--- a/packages/SystemUI/src/com/android/systemui/statusbar/policy/MobileSignalController.java
+++ b/packages/SystemUI/src/com/android/systemui/statusbar/policy/MobileSignalController.java
@@ -345,7 +345,7 @@
         if (isCarrierNetworkChangeActive()) {
             return false;
         }
-        if (isCdma()) {
+        if (isCdma() && mServiceState != null) {
             final int iconMode = mServiceState.getCdmaEriIconMode();
             return mServiceState.getCdmaEriIconIndex() != EriInfo.ROAMING_INDICATOR_OFF
                     && (iconMode == EriInfo.ROAMING_ICON_MODE_NORMAL
@@ -520,10 +520,12 @@
                         + " dataState=" + state.getDataRegState());
             }
             mServiceState = state;
-            mDataNetType = state.getDataNetworkType();
-            if (mDataNetType == TelephonyManager.NETWORK_TYPE_LTE && mServiceState != null &&
-                    mServiceState.isUsingCarrierAggregation()) {
-                mDataNetType = TelephonyManager.NETWORK_TYPE_LTE_CA;
+            if (state != null) {
+                mDataNetType = state.getDataNetworkType();
+                if (mDataNetType == TelephonyManager.NETWORK_TYPE_LTE && mServiceState != null &&
+                        mServiceState.isUsingCarrierAggregation()) {
+                    mDataNetType = TelephonyManager.NETWORK_TYPE_LTE_CA;
+                }
             }
             updateTelephony();
         }
diff --git a/packages/SystemUI/tests/src/com/android/systemui/statusbar/policy/NetworkControllerSignalTest.java b/packages/SystemUI/tests/src/com/android/systemui/statusbar/policy/NetworkControllerSignalTest.java
index 9055022..173cc4c 100644
--- a/packages/SystemUI/tests/src/com/android/systemui/statusbar/policy/NetworkControllerSignalTest.java
+++ b/packages/SystemUI/tests/src/com/android/systemui/statusbar/policy/NetworkControllerSignalTest.java
@@ -202,6 +202,14 @@
     }
 
     @Test
+    public void testRoamingNoService_DoesNotCrash() {
+        setupDefaultSignal();
+        setCdma();
+        mServiceState = null;
+        updateServiceState();
+    }
+
+    @Test
     @Ignore("Flaky")
     public void testQsSignalStrength() {
         for (int testStrength = SignalStrength.SIGNAL_STRENGTH_NONE_OR_UNKNOWN;