diff --git a/src/com/android/phone/IccNetworkDepersonalizationPanel.java b/src/com/android/phone/IccNetworkDepersonalizationPanel.java
index 4831423..9dff461 100644
--- a/src/com/android/phone/IccNetworkDepersonalizationPanel.java
+++ b/src/com/android/phone/IccNetworkDepersonalizationPanel.java
@@ -48,6 +48,12 @@
  */
 public class IccNetworkDepersonalizationPanel extends IccPanel {
 
+    /**
+     * Tracks whether there is an instance of the network depersonalization dialog showing or not.
+     * Ensures only a single instance of the dialog is visible.
+     */
+    private static boolean sShowingDialog = false;
+
     //debug constants
     private static final boolean DBG = false;
 
@@ -65,6 +71,21 @@
     private Button       mUnlockButton;
     private Button       mDismissButton;
 
+    /**
+     * Shows the network depersonalization dialog, but only if it is not already visible.
+     */
+    public static void showDialog() {
+        if (sShowingDialog) {
+            Log.i(TAG, "[IccNetworkDepersonalizationPanel] - showDialog; skipped already shown.");
+            return;
+        }
+        Log.i(TAG, "[IccNetworkDepersonalizationPanel] - showDialog; showing dialog.");
+        sShowingDialog = true;
+        IccNetworkDepersonalizationPanel ndpPanel =
+                new IccNetworkDepersonalizationPanel(PhoneGlobals.getInstance());
+        ndpPanel.show();
+    }
+
     //private textwatcher to control text entry.
     private TextWatcher mPinEntryWatcher = new TextWatcher() {
         public void beforeTextChanged(CharSequence buffer, int start, int olen, int nlen) {
@@ -160,6 +181,13 @@
         super.onStart();
     }
 
+    @Override
+    public void onStop() {
+        super.onStop();
+        Log.i(TAG, "[IccNetworkDepersonalizationPanel] - showDialog; hiding dialog.");
+        sShowingDialog = false;
+    }
+
     //Mirrors IccPinUnlockPanel.onKeyDown().
     public boolean onKeyDown(int keyCode, KeyEvent event) {
         if (keyCode == KeyEvent.KEYCODE_BACK) {
diff --git a/src/com/android/phone/PhoneGlobals.java b/src/com/android/phone/PhoneGlobals.java
index 315929b..fc08c5f 100644
--- a/src/com/android/phone/PhoneGlobals.java
+++ b/src/com/android/phone/PhoneGlobals.java
@@ -250,9 +250,7 @@
                         // The user won't be able to do anything else until
                         // they enter a valid SIM network PIN.
                         Log.i(LOG_TAG, "show sim depersonal panel");
-                        IccNetworkDepersonalizationPanel ndpPanel =
-                                new IccNetworkDepersonalizationPanel(PhoneGlobals.getInstance());
-                        ndpPanel.show();
+                        IccNetworkDepersonalizationPanel.showDialog();
                     }
                     break;