diff --git a/Hacks.java b/Hacks.java
new file mode 100644
index 000000000..49c3125ae
--- /dev/null
+++ b/Hacks.java
@@ -0,0 +1,75 @@
+/*
+Hacks.java
+Copyright (C) 2010  Belledonne Communications, Grenoble, France
+
+This program is free software; you can redistribute it and/or
+modify it under the terms of the GNU General Public License
+as published by the Free Software Foundation; either version 2
+of the License, or (at your option) any later version.
+
+This program is distributed in the hope that it will be useful,
+but WITHOUT ANY WARRANTY; without even the implied warranty of
+MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
+GNU General Public License for more details.
+
+You should have received a copy of the GNU General Public License
+along with this program; if not, write to the Free Software
+Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
+ */
+package org.linphone.core;
+
+import android.media.AudioManager;
+import android.os.Build;
+import android.util.Log;
+
+public class Hacks {
+
+	private Hacks() {}
+
+	public static boolean isGalaxyS() {
+		return Build.DEVICE.startsWith("GT-I9000") || Build.DEVICE.startsWith("GT-P1000");
+	}
+
+/*	private static final boolean log(final String msg) {
+		Log.d("Linphone", msg);
+		return true;
+	}*/
+
+	/* Not working as now
+	 * Calling from Galaxy S to PC is "usable" even with no hack; other side is not even with this one*/
+	public static void galaxySSwitchToCallStreamUnMuteLowerVolume(AudioManager am) {
+		// Switch to call audio channel (Galaxy S)
+		am.setSpeakerphoneOn(false);
+		sleep(200);
+
+		// Lower volume
+		am.setStreamVolume(AudioManager.STREAM_VOICE_CALL, 1, 0);
+
+		// Another way to select call channel
+		am.setMode(AudioManager.MODE_NORMAL);
+		sleep(200);
+
+		// Mic is muted if not doing this
+		am.setMicrophoneMute(true);
+		sleep(200);
+		am.setMicrophoneMute(false);
+		sleep(200);
+	}
+
+	private static final void sleep(int time) {
+		try  {
+			Thread.sleep(time);
+		} catch(InterruptedException ie){}
+	}
+
+	public static void dumpDeviceInformation() {
+		StringBuilder sb = new StringBuilder(" ==== Phone information dump ====\n");
+		sb.append("DEVICE=").append(Build.DEVICE).append("\n");
+		sb.append("MODEL=").append(Build.MODEL).append("\n");
+		//MANUFACTURER doesn't exist in android 1.5.
+		//sb.append("MANUFACTURER=").append(Build.MANUFACTURER).append("\n");
+		sb.append("SDK=").append(Build.VERSION.SDK);
+		
+		Log.d("Linphone", sb.toString());
+	}
+}
diff --git a/LinphoneCallImpl.java b/LinphoneCallImpl.java
index a7104ffef..b60d92fda 100644
--- a/LinphoneCallImpl.java
+++ b/LinphoneCallImpl.java
@@ -36,6 +36,7 @@ class LinphoneCallImpl implements LinphoneCall {
 	private native void enableEchoLimiter(long nativePtr,boolean enable);
 	private native boolean isEchoLimiterEnabled(long nativePtr);
 	private native long getReplacedCall(long nativePtr);
+	private native int getDuration(long nativePtr);
 
 	protected LinphoneCallImpl(long aNativePtr)  {
 		nativePtr = aNativePtr;
@@ -96,5 +97,9 @@ class LinphoneCallImpl implements LinphoneCall {
 		}
 		return null;
 	}
+
+	public int getDuration() {
+		return getDuration(nativePtr);
+	}
 	
 }
diff --git a/LinphoneCoreImpl.java b/LinphoneCoreImpl.java
index 533ee8b97..61afcd5d0 100644
--- a/LinphoneCoreImpl.java
+++ b/LinphoneCoreImpl.java
@@ -64,7 +64,7 @@ class LinphoneCoreImpl implements LinphoneCore {
 	private native void enableEchoCancellation(long nativePtr,boolean enable);
 	private native boolean isEchoCancellationEnabled(long nativePtr);
 	private native long getCurrentCall(long nativePtr) ;
-	private native void playDtmf(long nativePtr,char dtmf,int duration, boolean speaker);
+	private native void playDtmf(long nativePtr,char dtmf,int duration);
 	private native void stopDtmf(long nativePtr);
 	private native void setVideoWindowId(long nativePtr, Object wid);
 	private native void setPreviewWindowId(long nativePtr, Object wid);
@@ -298,8 +298,8 @@ class LinphoneCoreImpl implements LinphoneCore {
 		// TODO Auto-generated method stub
 		return false;
 	}
-	public void playDtmf(char number, int duration, boolean speaker) {
-		playDtmf(nativePtr,number, duration, speaker);
+	public void playDtmf(char number, int duration) {
+		playDtmf(nativePtr,number, duration);
 		
 	}
 	public void stopDtmf() {
@@ -439,4 +439,7 @@ class LinphoneCoreImpl implements LinphoneCore {
 	public void startEchoCalibration(Object data) throws LinphoneCoreException {
 		startEchoCalibration(nativePtr, data);
 	}
+	public Transport getSignalingTransport() {
+		throw new RuntimeException("Not implemented");
+	}
 }
diff --git a/video/AndroidCameraConf.java b/video/AndroidCameraConf.java
index 1d430082e..065ea22af 100644
--- a/video/AndroidCameraConf.java
+++ b/video/AndroidCameraConf.java
@@ -18,7 +18,7 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
 package org.linphone.core.video;
 
-import org.linphone.Hacks;
+import org.linphone.core.Hacks;
 
 import android.util.Log;