diff --git a/NetworkManagerConnectivity.cpp b/NetworkManagerConnectivity.cpp
index f76c8b4b..d33db4d7 100644
--- a/NetworkManagerConnectivity.cpp
+++ b/NetworkManagerConnectivity.cpp
@@ -158,12 +158,12 @@ namespace WPEFramework
             curl_easy_setopt(curl_easy_handle, CURLOPT_TIMEOUT_MS, deadline - current_time());
             if ((ipversion == CURL_IPRESOLVE_V4) || (ipversion == CURL_IPRESOLVE_V6))
             {
-                NMLOG_DEBUG("curlopt ipversion = %s reqtyp = %s", ipversion == CURL_IPRESOLVE_V4?"ipv4 only":"ipv6 only", headReq? "HEAD":"GET");
+                NMLOG_INFO("curlopt ipversion = %s reqtyp = %s", ipversion == CURL_IPRESOLVE_V4?"IPv4":"IPv6", headReq? "HEAD":"GET");
                 curl_easy_setopt(curl_easy_handle, CURLOPT_IPRESOLVE, ipversion);
             }
             else
             {
-                NMLOG_DEBUG("curlopt ipversion = whatever reqtyp = %s", headReq? "HEAD":"GET");
+                NMLOG_INFO("curlopt ipversion = whatever reqtyp = %s", headReq? "HEAD":"GET");
             }
             if(curlVerboseEnabled())
                 curl_easy_setopt(curl_easy_handle, CURLOPT_VERBOSE, 1L);
@@ -503,15 +503,17 @@ namespace WPEFramework
 
     void ConnectivityMonitor::notifyInternetStatusChangedEvent(nsm_internetState newInternetState)
     {
+        static Exchange::INetworkManager::InternetStatus oldState = Exchange::INetworkManager::InternetStatus::INTERNET_UNKNOWN;
         if(_instance != nullptr)
         {
-            Exchange::INetworkManager::InternetStatus oldState = static_cast<Exchange::INetworkManager::InternetStatus>(gInternetState.load());
+            NMLOG_INFO("notify internet state %s", getInternetStateString(newInternetState));
             Exchange::INetworkManager::InternetStatus newState = static_cast<Exchange::INetworkManager::InternetStatus>(newInternetState);
             _instance->ReportInternetStatusChange(oldState , newState);
             gInternetState = newInternetState;
+            oldState = newState; // 'gInternetState' not exactly previous state, it may change to unknow when interface changed
         }
         else
-            NMLOG_WARNING("NetworkManagerImplementation Instance NULL notifyInternetStatusChange failed.");
+            NMLOG_FATAL("NetworkManagerImplementation Instance NULL notifyInternetStatusChange failed.");
     }
 
     void ConnectivityMonitor::continuousMonitorFunction()
@@ -524,6 +526,22 @@ namespace WPEFramework
 
         do
         {
+            if(ginterfaceStatus == false)
+            {
+                NMLOG_DEBUG("no interface connected; no ccm check");
+                gIpv4InternetState = NO_INTERNET;
+                gIpv6InternetState = NO_INTERNET;
+                std::unique_lock<std::mutex> lock(connMutex);
+                cvContinuousMonitor.wait_for(lock, std::chrono::seconds(continuousMonitorTimeout.load()));
+                continue;
+            }
+            else
+            {
+                gIpv4InternetState = UNKNOWN;
+                gIpv6InternetState = UNKNOWN;
+                ipResolveTyp = NSM_IPRESOLVE_WHATEVER;
+            }
+
             if(doConnectivityMonitor)
             {
                 NMLOG_DEBUG("connectivity monitor running so skiping ccm check");
@@ -603,7 +621,6 @@ namespace WPEFramework
 
             if(gInternetState != currentInternetState)
             {
-                NMLOG_INFO("Internet state changed to %s", getInternetStateString(currentInternetState));
                 /* Notify Internet state change */
                 notifyInternetStatusChangedEvent(currentInternetState);
             }
@@ -702,7 +719,6 @@ namespace WPEFramework
             if(gInternetState != currentInternetState || notifyNow)
             {
                 notifyNow = false;
-                NMLOG_INFO("notify internet state %s", getInternetStateString(currentInternetState));
                 notifyInternetStatusChangedEvent(currentInternetState);
             }