diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 04575ec..a90d01f 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -2,7 +2,7 @@
 <manifest xmlns:android="http://schemas.android.com/apk/res/android"
     package="com.sinpo.nfcspy"
     android:versionCode="4"
-    android:versionName="1.0.140405" >
+    android:versionName="1.0.140907" >
 
     <uses-sdk
         android:minSdkVersion="14"
diff --git a/res/drawable-hdpi/banner.png b/res/drawable-hdpi/banner.png
index 066a940..7d11bef 100644
Binary files a/res/drawable-hdpi/banner.png and b/res/drawable-hdpi/banner.png differ
diff --git a/res/drawable-mdpi/banner.png b/res/drawable-mdpi/banner.png
index 7c3c58c..a549d4a 100644
Binary files a/res/drawable-mdpi/banner.png and b/res/drawable-mdpi/banner.png differ
diff --git a/res/drawable-xhdpi/banner.png b/res/drawable-xhdpi/banner.png
index 3084bce..77d4550 100644
Binary files a/res/drawable-xhdpi/banner.png and b/res/drawable-xhdpi/banner.png differ
diff --git a/res/drawable-xxhdpi/banner.png b/res/drawable-xxhdpi/banner.png
new file mode 100644
index 0000000..91d79b0
Binary files /dev/null and b/res/drawable-xxhdpi/banner.png differ
diff --git a/src/com/sinpo/nfcspy/ServiceAgent.java b/src/com/sinpo/nfcspy/ServiceAgent.java
index c78166a..462282b 100644
--- a/src/com/sinpo/nfcspy/ServiceAgent.java
+++ b/src/com/sinpo/nfcspy/ServiceAgent.java
@@ -176,7 +176,10 @@ private void onStartCommand(Intent intent) {
 
 			if (!p2p.isInited()) {
 				p2p.init(service, this);
-				service.registerReceiver(this, P2PFILTER);
+				if (!hasRegistered) {
+					service.registerReceiver(this, P2PFILTER);
+					hasRegistered = true;
+				}
 				sendStatus2Activity(MSG_P2P_INIT, STA_SUCCESS, STA_NOTCARE);
 			}
 
@@ -278,7 +281,11 @@ byte[] processCommandApdu(byte[] apdu, Bundle ignore) {
 	}
 
 	void onDestroy() {
-		service.unregisterReceiver(this);
+		if (hasRegistered) {
+			service.unregisterReceiver(this);
+			hasRegistered = false;
+		}
+
 		onCardDettached(null);
 		disconnect();
 	}
@@ -374,6 +381,7 @@ public void run() {
 	private IsoDep isodep;
 	private Messenger outbox;
 	private boolean lock;
+	private boolean hasRegistered;
 
 	private static boolean highSpeed;