diff --git a/services/java/com/android/server/ConnectivityService.java b/services/java/com/android/server/ConnectivityService.java
index ab0eb23a2f..02a78dea33 100644
--- a/services/java/com/android/server/ConnectivityService.java
+++ b/services/java/com/android/server/ConnectivityService.java
@@ -3929,39 +3929,41 @@ public class ConnectivityService extends IConnectivityManager.Stub {
 
     /**
      * No connection was possible to the network.
+     * This is NOT a warm sim.
      */
-    public static final int CMP_RESULT_CODE_NO_CONNECTION = 0;
+    private static final int CMP_RESULT_CODE_NO_CONNECTION = 0;
 
     /**
      * A connection was made to the internet, all is well.
+     * This is NOT a warm sim.
      */
-    public static final int CMP_RESULT_CODE_CONNECTABLE = 1;
-
-    /**
-     * A connection was made but there was a redirection, we appear to be in walled garden.
-     * This is an indication of a warm sim on a mobile network.
-     */
-    public static final int CMP_RESULT_CODE_REDIRECTED = 2;
+    private static final int CMP_RESULT_CODE_CONNECTABLE = 1;
 
     /**
      * A connection was made but no dns server was available to resolve a name to address.
-     * This is an indication of a warm sim on a mobile network.
+     * This is NOT a warm sim since provisioning network is supported.
      */
-    public static final int CMP_RESULT_CODE_NO_DNS = 3;
+    private static final int CMP_RESULT_CODE_NO_DNS = 2;
 
     /**
      * A connection was made but could not open a TCP connection.
-     * This is an indication of a warm sim on a mobile network.
+     * This is NOT a warm sim since provisioning network is supported.
      */
-    public static final int CMP_RESULT_CODE_NO_TCP_CONNECTION = 4;
+    private static final int CMP_RESULT_CODE_NO_TCP_CONNECTION = 3;
+
+    /**
+     * A connection was made but there was a redirection, we appear to be in walled garden.
+     * This is an indication of a warm sim on a mobile network such as T-Mobile.
+     */
+    private static final int CMP_RESULT_CODE_REDIRECTED = 4;
 
     /**
      * The mobile network is a provisioning network.
-     * This is an indication of a warm sim on a mobile network.
+     * This is an indication of a warm sim on a mobile network such as AT&T.
      */
-    public static final int CMP_RESULT_CODE_PROVISIONING_NETWORK = 5;
+    private static final int CMP_RESULT_CODE_PROVISIONING_NETWORK = 5;
 
-    AtomicBoolean mIsCheckingMobileProvisioning = new AtomicBoolean(false);
+    private AtomicBoolean mIsCheckingMobileProvisioning = new AtomicBoolean(false);
 
     @Override
     public int checkMobileProvisioning(int suggestedTimeOutMs) {
@@ -4036,7 +4038,9 @@ public class ConnectivityService extends IConnectivityManager.Stub {
                             mNetTrackers[ConnectivityManager.TYPE_MOBILE_HIPRI].getNetworkInfo();
                     switch(result) {
                         case CMP_RESULT_CODE_CONNECTABLE:
-                        case CMP_RESULT_CODE_NO_CONNECTION: {
+                        case CMP_RESULT_CODE_NO_CONNECTION:
+                        case CMP_RESULT_CODE_NO_DNS:
+                        case CMP_RESULT_CODE_NO_TCP_CONNECTION: {
                             if (DBG) log("CheckMp.onComplete: ignore, connected or no connection");
                             break;
                         }
@@ -4055,8 +4059,7 @@ public class ConnectivityService extends IConnectivityManager.Stub {
                             }
                             break;
                         }
-                        case CMP_RESULT_CODE_NO_DNS:
-                        case CMP_RESULT_CODE_NO_TCP_CONNECTION: {
+                        case CMP_RESULT_CODE_PROVISIONING_NETWORK: {
                             String url = getMobileProvisioningUrl();
                             if (TextUtils.isEmpty(url) == false) {
                                 if (DBG) log("CheckMp.onComplete: warm (no dns/tcp), url=" + url);
@@ -4222,8 +4225,8 @@ public class ConnectivityService extends IConnectivityManager.Stub {
                         MobileDataStateTracker mdst = (MobileDataStateTracker)
                                 mCs.mNetTrackers[ConnectivityManager.TYPE_MOBILE_HIPRI];
                         if (mdst.isProvisioningNetwork()) {
-                            if (DBG) log("isMobileOk: isProvisioningNetwork is true, no TCP conn");
-                            result = CMP_RESULT_CODE_NO_TCP_CONNECTION;
+                            if (DBG) log("isMobileOk: isProvisioningNetwork is true");
+                            result = CMP_RESULT_CODE_PROVISIONING_NETWORK;
                             return result;
                         } else {
                             if (DBG) log("isMobileOk: isProvisioningNetwork is false, continue");
@@ -4303,25 +4306,37 @@ public class ConnectivityService extends IConnectivityManager.Stub {
                                 urlConn.setAllowUserInteraction(false);
                                 urlConn.setRequestProperty("Connection", "close");
                                 int responseCode = urlConn.getResponseCode();
-                                if (responseCode == 204) {
-                                    result = CMP_RESULT_CODE_CONNECTABLE;
-                                } else {
-                                    result = CMP_RESULT_CODE_REDIRECTED;
-                                }
-                                log("isMobileOk: connected responseCode=" + responseCode);
+
+                                // For debug display the headers
+                                Map<String, List<String>> headers = urlConn.getHeaderFields();
+                                log("isMobileOk: headers=" + headers);
+
+                                // Close the connection
                                 urlConn.disconnect();
                                 urlConn = null;
-                                return result;
+
+                                if (responseCode == 204) {
+                                    // Return
+                                    log("isMobileOk: expected responseCode=" + responseCode);
+                                    result = CMP_RESULT_CODE_CONNECTABLE;
+                                    return result;
+                                } else {
+                                    // Retry to be sure this was redirected, we've gotten
+                                    // occasions where a server returned 200 even though
+                                    // the device didn't have a "warm" sim.
+                                    log("isMobileOk: not expected responseCode=" + responseCode);
+                                    result = CMP_RESULT_CODE_REDIRECTED;
+                                }
                             } catch (Exception e) {
                                 log("isMobileOk: HttpURLConnection Exception e=" + e);
+                                result = CMP_RESULT_CODE_NO_TCP_CONNECTION;
                                 if (urlConn != null) {
                                     urlConn.disconnect();
                                     urlConn = null;
                                 }
                             }
                         }
-                        result = CMP_RESULT_CODE_NO_TCP_CONNECTION;
-                        log("isMobileOk: loops|timed out");
+                        log("isMobileOk: loops|timed out result=" + result);
                         return result;
                     } catch (Exception e) {
                         log("isMobileOk: Exception e=" + e);