diff --git a/.gitignore b/.gitignore
index f6721f6f3..426ff4445 100644
--- a/.gitignore
+++ b/.gitignore
@@ -3,6 +3,7 @@ obj
 gen
 bin
 doc
+default.properties
 local.properties
 project.properties
 tests/*$py.class
diff --git a/AndroidManifest.xml b/AndroidManifest.xml
index 5a9dd168e..d649a1660 100644
--- a/AndroidManifest.xml
+++ b/AndroidManifest.xml
@@ -31,6 +31,9 @@
 	<uses-permission android:name="android.permission.WRITE_EXTERNAL_STORAGE"/>
 	<!-- Needed to use our own Contact editor -->
 	<uses-permission android:name="android.permission.WRITE_CONTACTS"/>
+	<!-- Needed to route the audio to the bluetooth headset if available -->
+	<uses-permission android:name="android.permission.BLUETOOTH" />
+	<uses-permission android:name="android.permission.BROADCAST_STICKY" />
 	
 	<supports-screens android:smallScreens="true" android:normalScreens="true" android:largeScreens="true" android:xlargeScreens="true" android:anyDensity="true"/>
     
@@ -104,6 +107,14 @@
 			<intent-filter><action android:name="android.net.conn.CONNECTIVITY_CHANGE"></action></intent-filter>
 		</receiver>
 	
+	    <receiver android:name="org.linphone.BluetoothManager">
+			<intent-filter>
+			    <action android:name="android.bluetooth.device.action.ACL_CONNECTED"/>
+			    <action android:name="android.bluetooth.device.action.ACL_DISCONNECTED"/>
+			    <action android:name="android.bluetooth.adapter.action.CONNECTION_STATE_CHANGED"/>
+		    </intent-filter>
+		</receiver>
+	
 		<receiver android:name="org.linphone.BootReceiver">
 			<intent-filter><action android:name="android.intent.action.BOOT_COMPLETED"></action></intent-filter>
 		</receiver>
diff --git a/res/values/non_localizable_custom.xml b/res/values/non_localizable_custom.xml
index 96e14b649..56c2e3afc 100644
--- a/res/values/non_localizable_custom.xml
+++ b/res/values/non_localizable_custom.xml
@@ -55,6 +55,8 @@
 	
 	<bool name="hash_images_as_name_before_upload">true</bool>
 	
+	<bool name="route_audio_to_bluetooth_if_available">true</bool>
+	
 	<bool name="disable_every_log">false</bool>
 	<bool name="disable_all_security_features_for_markets">false</bool> <!-- Disable TLS/SRTP/ZRTP -->
 	<bool name="disable_all_patented_codecs_for_markets">false</bool> <!-- Disable MPEG4/H264 -->
diff --git a/res/values/non_localizable_defaults.xml b/res/values/non_localizable_defaults.xml
index 5af444e96..1b5bd2618 100644
--- a/res/values/non_localizable_defaults.xml
+++ b/res/values/non_localizable_defaults.xml
@@ -5,18 +5,18 @@
     <string name="pref_tunnel_port_default">443</string>
     <string name="default_tunnel_mode_entry_value">@string/tunnel_mode_entry_value_disabled</string>
     
-    <bool name="pref_echo_canceller_default">false</bool>
+    <bool name="pref_echo_canceller_default">true</bool>
     <!-- Audio codecs -->
     <bool name="pref_codec_speex16_default">true</bool>
     <bool name="pref_codec_speex8_default">true</bool>
     <bool name="pref_codec_ilbc_default">true</bool>
-    <bool name="pref_codec_amr_default">true</bool>
+    <bool name="pref_codec_amr_default">false</bool>
     <bool name="pref_codec_g729_default">true</bool>
-    <bool name="pref_codec_amrwb_default">true</bool>
+    <bool name="pref_codec_amrwb_default">false</bool>
     <bool name="pref_codec_gsm_default">true</bool>
-    <bool name="pref_codec_g722_default">true</bool>
+    <bool name="pref_codec_g722_default">false</bool>
     <bool name="pref_codec_silk24_default">false</bool>
-    <bool name="pref_codec_silk16_default">false</bool>
+    <bool name="pref_codec_silk16_default">true</bool>
     <bool name="pref_codec_pcmu_default">true</bool>
     <bool name="pref_codec_pcma_default">true</bool>
     
diff --git a/src/org/linphone/BluetoothManager.java b/src/org/linphone/BluetoothManager.java
new file mode 100644
index 000000000..5e6287442
--- /dev/null
+++ b/src/org/linphone/BluetoothManager.java
@@ -0,0 +1,40 @@
+package org.linphone;
+
+import org.linphone.mediastream.Log;
+
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothDevice;
+import android.content.BroadcastReceiver;
+import android.content.Context;
+import android.content.Intent;
+
+public class BluetoothManager extends BroadcastReceiver {
+	 public void onReceive(Context context, Intent intent) {
+        boolean routeToBT = context.getResources().getBoolean(R.bool.route_audio_to_bluetooth_if_available);
+        if (!routeToBT)
+        	return;
+        
+        String action = intent.getAction();
+        LinphoneManager lm = LinphoneManager.getInstance();
+     
+        if (BluetoothDevice.ACTION_ACL_DISCONNECTED.equals(action)) {
+            Log.e("Bluetooth Received Event" + " ACTION_ACL_DISCONNECTED" );
+            
+            if (lm != null) {
+            	lm.uninitBluetooth();
+            	lm.routeAudioToReceiver();
+            }
+        } else if (BluetoothDevice.ACTION_ACL_CONNECTED.equals(action)) {
+            Log.e("Bluetooth Received Event" + " ACTION_ACL_CONNECTED" );
+            
+            if (lm != null) {
+            	lm.routeToBluetoothIfAvailable();
+            }
+        } else if (BluetoothAdapter.ACTION_CONNECTION_STATE_CHANGED.equals(action)) {
+        	Log.e("Bluetooth state changed!");
+            if (lm != null) {
+            	lm.startBluetooth();
+            }
+        }
+    }
+}
diff --git a/src/org/linphone/InCallActivity.java b/src/org/linphone/InCallActivity.java
index 5c56d344c..706a920bb 100644
--- a/src/org/linphone/InCallActivity.java
+++ b/src/org/linphone/InCallActivity.java
@@ -166,6 +166,10 @@ public class InCallActivity extends FragmentActivity implements
             callFragment.setArguments(getIntent().getExtras());
             getSupportFragmentManager().beginTransaction().add(R.id.fragmentContainer, callFragment).commitAllowingStateLoss();
         }
+        
+        boolean routeToBT = getResources().getBoolean(R.bool.route_audio_to_bluetooth_if_available);
+		if (routeToBT && LinphoneManager.isInstanciated() && !isSpeakerEnabled)
+			LinphoneManager.getInstance().routeToBluetoothIfAvailable();
 	}
 	
 	@Override
@@ -475,11 +479,15 @@ public class InCallActivity extends FragmentActivity implements
 		if (isSpeakerEnabled) {
 			LinphoneManager.getInstance().routeAudioToSpeaker();
 			speaker.setBackgroundResource(R.drawable.speaker_on);
+			LinphoneManager.getLc().enableSpeaker(isSpeakerEnabled);
 		} else {
 			LinphoneManager.getInstance().routeAudioToReceiver();
 			speaker.setBackgroundResource(R.drawable.speaker_off);
+			
+			boolean routeToBT = getResources().getBoolean(R.bool.route_audio_to_bluetooth_if_available);
+			if (!routeToBT)
+				LinphoneManager.getLc().enableSpeaker(isSpeakerEnabled);
 		}
-		LinphoneManager.getLc().enableSpeaker(isSpeakerEnabled);
 	}
 	
 	private void pauseOrResumeCall() {
@@ -969,8 +977,13 @@ public class InCallActivity extends FragmentActivity implements
 				switchVideo(isVideoEnabled, false);
 			}
 
-			// The following should not be needed except some devices need it (e.g. Galaxy S).
-			LinphoneManager.getLc().enableSpeaker(isSpeakerEnabled);
+			boolean routeToBT = getResources().getBoolean(R.bool.route_audio_to_bluetooth_if_available);
+			if (routeToBT && LinphoneManager.isInstanciated() && !isSpeakerEnabled) {
+				LinphoneManager.getInstance().routeToBluetoothIfAvailable();
+			} else {
+				// The following should not be needed except some devices need it (e.g. Galaxy S).
+				LinphoneManager.getLc().enableSpeaker(isSpeakerEnabled);
+			}
 
 			isMicMuted = LinphoneManager.getLc().isMicMuted();
 			enableAndRefreshInCallActions();
diff --git a/src/org/linphone/LinphoneManager.java b/src/org/linphone/LinphoneManager.java
index e7afcb1b7..16a26d6d7 100644
--- a/src/org/linphone/LinphoneManager.java
+++ b/src/org/linphone/LinphoneManager.java
@@ -76,7 +76,12 @@ import org.linphone.mediastream.video.capture.hwconf.AndroidCameraConfiguration.
 import org.linphone.mediastream.video.capture.hwconf.Hacks;
 
 import android.annotation.SuppressLint;
+import android.annotation.TargetApi;
 import android.app.Activity;
+import android.bluetooth.BluetoothAdapter;
+import android.bluetooth.BluetoothDevice;
+import android.bluetooth.BluetoothHeadset;
+import android.bluetooth.BluetoothProfile;
 import android.content.BroadcastReceiver;
 import android.content.ContentResolver;
 import android.content.Context;
@@ -141,6 +146,10 @@ public final class LinphoneManager implements LinphoneCoreListener {
 	private static boolean sExited;
 
 	private WakeLock mIncallWakeLock;
+	
+	private BluetoothAdapter mBluetoothAdapter;
+	private BluetoothHeadset mBluetoothHeadset;
+	private BluetoothProfile.ServiceListener mProfileListener;
 
 	private static List<LinphoneSimpleListener> simpleListeners = new ArrayList<LinphoneSimpleListener>();
 	public static void addListener(LinphoneSimpleListener listener) {
@@ -190,9 +199,23 @@ public final class LinphoneManager implements LinphoneCoreListener {
 	private  BroadcastReceiver mKeepAliveReceiver = new KeepAliveReceiver();
 
 	private void routeAudioToSpeakerHelper(boolean speakerOn) {
-		mLc.enableSpeaker(speakerOn);
+		boolean routeToBluetoothEnabled = false;
+		if (!speakerOn) {
+			boolean routeToBT = mServiceContext.getResources().getBoolean(R.bool.route_audio_to_bluetooth_if_available);
+			if (!routeToBT || (routeToBT && !routeToBluetoothIfAvailable())) {
+				mLc.enableSpeaker(false);
+				uninitBluetooth();
+			} else {
+				Log.d("Routing audio to bluetooth headset");
+				routeToBluetoothEnabled = true;
+			}
+		} else {
+			mLc.enableSpeaker(true);
+			uninitBluetooth();
+		}
+		
 		for (LinphoneOnAudioChangedListener listener : getSimpleListeners(LinphoneOnAudioChangedListener.class)) {
-			listener.onAudioStateChanged(speakerOn ? AudioState.SPEAKER : AudioState.EARPIECE);
+			listener.onAudioStateChanged(speakerOn ? AudioState.SPEAKER : (routeToBluetoothEnabled ? AudioState.BLUETOOTH : AudioState.EARPIECE));
 		}
 	}
 	public void routeAudioToSpeaker() {
@@ -216,6 +239,66 @@ public final class LinphoneManager implements LinphoneCoreListener {
 	public void routeAudioToReceiver() {
 		routeAudioToSpeakerHelper(false);
 	}
+	
+	@TargetApi(Build.VERSION_CODES.HONEYCOMB)
+	public void startBluetooth() {
+		mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
+		if (Version.sdkAboveOrEqual(Version.API11_HONEYCOMB_30) && mBluetoothAdapter.isEnabled()) {
+			mProfileListener = new BluetoothProfile.ServiceListener() {
+				@TargetApi(Build.VERSION_CODES.HONEYCOMB)
+				public void onServiceConnected(int profile, BluetoothProfile proxy) {
+				    if (profile == BluetoothProfile.HEADSET) {
+				        mBluetoothHeadset = (BluetoothHeadset) proxy;
+				        Log.d("Bluetooth headset connected");
+				        routeToBluetoothIfAvailable();
+				    }
+				}
+				@TargetApi(Build.VERSION_CODES.HONEYCOMB)
+				public void onServiceDisconnected(int profile) {
+				    if (profile == BluetoothProfile.HEADSET) {
+				        mBluetoothHeadset = null;
+				        Log.d("Bluetooth headset disconnected");
+				        routeAudioToReceiver();
+				    }
+				}
+			};
+			mBluetoothAdapter.getProfileProxy(mServiceContext, mProfileListener, BluetoothProfile.HEADSET);
+		} else {
+			routeAudioToReceiver();
+		}
+	}
+	
+	@TargetApi(Build.VERSION_CODES.HONEYCOMB)
+	public boolean routeToBluetoothIfAvailable() {
+		BluetoothAdapter mBluetoothAdapter = BluetoothAdapter.getDefaultAdapter();
+		if (Version.sdkAboveOrEqual(Version.API11_HONEYCOMB_30) && mBluetoothAdapter.isEnabled() && mAudioManager.isBluetoothScoAvailableOffCall()) {
+			mAudioManager.setBluetoothScoOn(true);	
+			mAudioManager.startBluetoothSco();
+
+			boolean connected = false;
+			if (mBluetoothHeadset != null) {
+				List<BluetoothDevice> devices = mBluetoothHeadset.getConnectedDevices();                        
+				for (final BluetoothDevice dev : devices) {           
+					connected |= mBluetoothHeadset.getConnectionState(dev) == BluetoothHeadset.STATE_CONNECTED;
+				}
+			}
+			
+			if (!connected) {
+				Log.d("No bluetooth device available");	
+				uninitBluetooth();
+			}
+			return connected;
+		}
+		return false;
+	}
+	
+	@TargetApi(Build.VERSION_CODES.HONEYCOMB)
+	public void uninitBluetooth() {
+		if (Version.sdkAboveOrEqual(Version.API11_HONEYCOMB_30) && mAudioManager != null) {
+			mAudioManager.stopBluetoothSco();
+			mAudioManager.setBluetoothScoOn(false);
+		}
+	}
 
 	public synchronized static final LinphoneManager createAndStart(
 			Context c, LinphoneServiceListener listener) {
@@ -463,6 +546,11 @@ public final class LinphoneManager implements LinphoneCoreListener {
 			IntentFilter lFilter = new IntentFilter(Intent.ACTION_SCREEN_ON);
 	        lFilter.addAction(Intent.ACTION_SCREEN_OFF);
 	        mServiceContext.registerReceiver(mKeepAliveReceiver, lFilter);
+			
+	        boolean routeToBT = mServiceContext.getResources().getBoolean(R.bool.route_audio_to_bluetooth_if_available);
+	        if (routeToBT) {
+	        	startBluetooth();
+	        }
 		}
 		catch (Exception e) {
 			Log.e(e, "Cannot start linphone");
diff --git a/src/org/linphone/LinphoneSimpleListener.java b/src/org/linphone/LinphoneSimpleListener.java
index b34fa7469..3d2fe0d7f 100644
--- a/src/org/linphone/LinphoneSimpleListener.java
+++ b/src/org/linphone/LinphoneSimpleListener.java
@@ -56,7 +56,7 @@ public interface LinphoneSimpleListener {
 	}
 
 	public static interface LinphoneOnAudioChangedListener extends LinphoneSimpleListener {
-		public enum AudioState {EARPIECE, SPEAKER}
+		public enum AudioState {EARPIECE, SPEAKER, BLUETOOTH}
 		void onAudioStateChanged(AudioState state);
 	}
 	
diff --git a/src/org/linphone/RemoteProvisioning.java b/src/org/linphone/RemoteProvisioning.java
index 125dc5bcf..c44af7ad2 100644
--- a/src/org/linphone/RemoteProvisioning.java
+++ b/src/org/linphone/RemoteProvisioning.java
@@ -19,6 +19,7 @@ public class RemoteProvisioning {
 		String mRPAddress;
 		String mSchema;
 		String mLocalLP;
+		boolean value;
 
 		public RemoteProvisioningThread(final String RPAddress, final String LocalLP, final String schema) {
 			this.mRPAddress = RPAddress;
@@ -28,6 +29,7 @@ public class RemoteProvisioning {
 		
 	    public void run() {
 	    	try {
+	    		value = false;
 	    		Log.i("Download remote provisioning file from " + mRPAddress);
 	    		URL url = new URL(mRPAddress);
 				URLConnection ucon = url.openConnection();
@@ -68,6 +70,7 @@ public class RemoteProvisioning {
 				} else {
 					lp.sync();
 				}
+				value = true;
 				Log.i("Remote provisioning ok");
 	    	} catch (MalformedURLException e) {
 	    		Log.e("Invalid remote provisioning url: " + e.getLocalizedMessage());
@@ -81,7 +84,7 @@ public class RemoteProvisioning {
 	    }
 	};
 	
-	static void download(String address, String lpfile, boolean check) {
+	static boolean download(String address, String lpfile, boolean check) {
 		try {
 			String schema = null;
 			if(check) {
@@ -92,13 +95,15 @@ public class RemoteProvisioning {
 				thread.start();
 				thread.wait();
 			}
+			return thread.value;
 		} catch (InterruptedException e) {
 			Log.e(e);
 		}
+		return false;
 	}
 	
-	static void download(String address, String lpfile) {
-		download(address, lpfile, true);
+	static boolean download(String address, String lpfile) {
+		return download(address, lpfile, true);
 	}
 	
 	static boolean isAvailable() {
diff --git a/src/org/linphone/setup/SetupActivity.java b/src/org/linphone/setup/SetupActivity.java
index 994a4e282..286d99459 100644
--- a/src/org/linphone/setup/SetupActivity.java
+++ b/src/org/linphone/setup/SetupActivity.java
@@ -139,7 +139,7 @@ public class SetupActivity extends FragmentActivity implements OnClickListener {
 	}
 
 	private void launchEchoCancellerCalibration(boolean sendEcCalibrationResult) {
-		if (!Hacks.hasBuiltInEchoCanceller() && !mPref.getBoolean(getString(R.string.first_launch_suceeded_once_key), false)) {
+		if (LinphoneManager.getLc().needsEchoCalibration() && !mPref.getBoolean(getString(R.string.first_launch_suceeded_once_key), false)) {
 			EchoCancellerCalibrationFragment fragment = new EchoCancellerCalibrationFragment();
 			fragment.enableEcCalibrationResultSending(sendEcCalibrationResult);
 			changeFragment(fragment);
diff --git a/submodules/linphone b/submodules/linphone
index 5b14c78bb..d83779419 160000
--- a/submodules/linphone
+++ b/submodules/linphone
@@ -1 +1 @@
-Subproject commit 5b14c78bbd4a22494ec54531129e5ab30b4d1667
+Subproject commit d8377941920f52ffbedf2b8fb90b2e884e1a0dc5