diff --git a/src/java/com/android/internal/telephony/cdma/CDMAPhone.java b/src/java/com/android/internal/telephony/cdma/CDMAPhone.java
index c3ac036..1fe2a7d 100644
--- a/src/java/com/android/internal/telephony/cdma/CDMAPhone.java
+++ b/src/java/com/android/internal/telephony/cdma/CDMAPhone.java
@@ -285,9 +285,22 @@
 
     @Override
     public ServiceState getServiceState() {
-        return mSST.mSS;
+        if (mSST == null || mSST.mSS.getState() != ServiceState.STATE_IN_SERVICE) {
+            if (mImsPhone != null &&
+                    mImsPhone.getServiceState().getState() == ServiceState.STATE_IN_SERVICE) {
+                return mImsPhone.getServiceState();
+            }
+        }
+
+        if (mSST != null) {
+            return mSST.mSS;
+        } else {
+            // avoid potential NPE in EmergencyCallHelper during Phone switch
+            return new ServiceState();
+        }
     }
 
+
     @Override
     public CallTracker getCallTracker() {
         return mCT;
diff --git a/src/java/com/android/internal/telephony/gsm/GSMPhone.java b/src/java/com/android/internal/telephony/gsm/GSMPhone.java
index c9d1d5e..5c01684 100644
--- a/src/java/com/android/internal/telephony/gsm/GSMPhone.java
+++ b/src/java/com/android/internal/telephony/gsm/GSMPhone.java
@@ -290,6 +290,13 @@
     @Override
     public ServiceState
     getServiceState() {
+        if (mSST == null || mSST.mSS.getState() != ServiceState.STATE_IN_SERVICE) {
+            if (mImsPhone != null &&
+                    mImsPhone.getServiceState().getState() == ServiceState.STATE_IN_SERVICE) {
+                return mImsPhone.getServiceState();
+            }
+        }
+
         if (mSST != null) {
             return mSST.mSS;
         } else {