diff --git a/dom/network/src/MobileConnection.cpp b/dom/network/src/MobileConnection.cpp
index 47f99e38525..053af9f2ef5 100644
--- a/dom/network/src/MobileConnection.cpp
+++ b/dom/network/src/MobileConnection.cpp
@@ -13,6 +13,7 @@
 #include "IccManager.h"
 #include "GeneratedEvents.h"
 #include "nsIDOMICCCardLockErrorEvent.h"
+#include "CFStateChangeEvent.h"
 
 #include "nsContentUtils.h"
 #include "nsJSUtils.h"
@@ -20,6 +21,7 @@
 #include "jsapi.h"
 
 #include "mozilla/dom/USSDReceivedEventBinding.h"
+#include "mozilla/dom/CFStateChangeEventBinding.h"
 
 #define NS_RILCONTENTHELPER_CONTRACTID "@mozilla.org/ril/content-helper;1"
 
@@ -30,6 +32,7 @@
 #define USSDRECEIVED_EVENTNAME     NS_LITERAL_STRING("ussdreceived")
 #define DATAERROR_EVENTNAME        NS_LITERAL_STRING("dataerror")
 #define ICCCARDLOCKERROR_EVENTNAME NS_LITERAL_STRING("icccardlockerror")
+#define CFSTATECHANGE_EVENTNAME    NS_LITERAL_STRING("cfstatechange")
 
 DOMCI_DATA(MozMobileConnection, mozilla::dom::network::MobileConnection)
 
@@ -44,6 +47,7 @@ const char* kIccInfoChangedTopic   = "mobile-connection-iccinfo-changed";
 const char* kUssdReceivedTopic     = "mobile-connection-ussd-received";
 const char* kDataErrorTopic        = "mobile-connection-data-error";
 const char* kIccCardLockErrorTopic = "mobile-connection-icccardlock-error";
+const char* kCfStateChangedTopic   = "mobile-connection-cfstate-change";
 
 NS_IMPL_CYCLE_COLLECTION_TRAVERSE_BEGIN_INHERITED(MobileConnection,
                                                   nsDOMEventTargetHelper)
@@ -71,6 +75,7 @@ NS_IMPL_EVENT_HANDLER(MobileConnection, datachange)
 NS_IMPL_EVENT_HANDLER(MobileConnection, ussdreceived)
 NS_IMPL_EVENT_HANDLER(MobileConnection, dataerror)
 NS_IMPL_EVENT_HANDLER(MobileConnection, icccardlockerror)
+NS_IMPL_EVENT_HANDLER(MobileConnection, cfstatechange)
 
 MobileConnection::MobileConnection()
 {
@@ -103,6 +108,7 @@ MobileConnection::Init(nsPIDOMWindow* aWindow)
   obs->AddObserver(this, kUssdReceivedTopic, false);
   obs->AddObserver(this, kDataErrorTopic, false);
   obs->AddObserver(this, kIccCardLockErrorTopic, false);
+  obs->AddObserver(this, kCfStateChangedTopic, false);
 
   mIccManager = new icc::IccManager();
   mIccManager->Init(aWindow);
@@ -124,6 +130,7 @@ MobileConnection::Shutdown()
   obs->RemoveObserver(this, kUssdReceivedTopic);
   obs->RemoveObserver(this, kDataErrorTopic);
   obs->RemoveObserver(this, kIccCardLockErrorTopic);
+  obs->RemoveObserver(this, kCfStateChangedTopic);
 
   if (mIccManager) {
     mIccManager->Shutdown();
@@ -238,6 +245,25 @@ MobileConnection::Observe(nsISupports* aSubject,
     return NS_OK;
   }
 
+  if (!strcmp(aTopic, kCfStateChangedTopic)) {
+    mozilla::dom::CFStateChangeEventDict dict;
+    bool ok = dict.Init(nsDependentString(aData));
+    NS_ENSURE_TRUE(ok, NS_ERROR_FAILURE);
+
+    nsRefPtr<CFStateChangeEvent> event =
+      CFStateChangeEvent::Create(dict.mSuccess,
+                                 dict.mAction,
+                                 dict.mReason,
+                                 dict.mNumber,
+                                 dict.mTimeSeconds,
+                                 dict.mServiceClass);
+    NS_ASSERTION(event, "This should never fail!");
+
+    nsresult rv = event->Dispatch(ToIDOMEventTarget(), CFSTATECHANGE_EVENTNAME);
+    NS_ENSURE_SUCCESS(rv, rv);
+    return NS_OK;
+  }
+
   MOZ_NOT_REACHED("Unknown observer topic!");
   return NS_OK;
 }