diff --git a/libs/armeabi-v7a/liblinphone.so b/libs/armeabi-v7a/liblinphone.so
index fc826b2b5..12cfd8ee4 100755
Binary files a/libs/armeabi-v7a/liblinphone.so and b/libs/armeabi-v7a/liblinphone.so differ
diff --git a/libs/armeabi/liblinphone.so b/libs/armeabi/liblinphone.so
index f114de63d..123493884 100755
Binary files a/libs/armeabi/liblinphone.so and b/libs/armeabi/liblinphone.so differ
diff --git a/src/org/linphone/DialerActivity.java b/src/org/linphone/DialerActivity.java
index 99586d6d3..dbbbb102e 100644
--- a/src/org/linphone/DialerActivity.java
+++ b/src/org/linphone/DialerActivity.java
@@ -558,12 +558,12 @@ public class DialerActivity extends Activity implements LinphoneCoreListener {
 				}
 			}
 			public boolean onTouch(View v, MotionEvent event) {
-				if (v.isPressed() && mIsDtmfStarted ==false) {
+				if (event.getAction() == MotionEvent.ACTION_DOWN && mIsDtmfStarted ==false) {
 					LinphoneCore lc = LinphoneService.instance().getLinphoneCore();
 					lc.playDtmf(mKeyCode.charAt(0), -1);
 					mIsDtmfStarted=true;
 				} else {
-					if (!v.isPressed()) 
+					if (event.getAction() == MotionEvent.ACTION_UP) 
 						stopDtmf();
 				}
 				return false;
diff --git a/src/org/linphone/LinphoneService.java b/src/org/linphone/LinphoneService.java
index 3ceec812c..5727e4cac 100644
--- a/src/org/linphone/LinphoneService.java
+++ b/src/org/linphone/LinphoneService.java
@@ -364,7 +364,7 @@ public class LinphoneService extends Service implements LinphoneCoreListener {
 			if (lDefaultProxyConfig !=null) {
 				//prefix      
 				String lPrefix = mPref.getString(getString(R.string.pref_prefix_key), null);
-				if (lPrefix != null  && lPrefix.length()>0) {
+				if (lPrefix != null) {
 					lDefaultProxyConfig.setDialPrefix(lPrefix);
 				}
 				//escape +
diff --git a/submodules/linphone b/submodules/linphone
index 8210107a3..176616e0f 160000
--- a/submodules/linphone
+++ b/submodules/linphone
@@ -1 +1 @@
-Subproject commit 8210107a35463f30894027ad271ee0f66d79cb00
+Subproject commit 176616e0fb7f02dd27469b44510428e7140a0461