diff --git a/coreapi/linphonecore_jni.cc b/coreapi/linphonecore_jni.cc
index dca5d701a..5b676ebce 100644
--- a/coreapi/linphonecore_jni.cc
+++ b/coreapi/linphonecore_jni.cc
@@ -264,6 +264,24 @@ public:
 							,env->CallStaticObjectMethod(lcData->registrationStateClass,lcData->registrationStateFromIntId,(jint)state),
 							message ? env->NewStringUTF(message) : NULL);
 	}
+	jobject getCall(JNIEnv *env , LinphoneCall *call){
+		jobject jobj=0;
+
+		if (call!=NULL){
+			void *up=linphone_call_get_user_pointer(call);
+			
+			if (up==NULL){
+				jobj=env->NewObject(callClass,callCtrId,(jlong)call);
+				linphone_call_set_user_pointer(call,(void*)jobj);
+				//env->NewGlobalRef(jobj);
+				linphone_call_ref(call);
+			}else{
+				jobj=(jobject)up;
+			}
+		}
+		return jobj;
+	}
+
 	static void callStateChange(LinphoneCore *lc, LinphoneCall* call,LinphoneCallState state,const char* message) {
 		JNIEnv *env = 0;
 		jint result = jvm->AttachCurrentThread(&env,NULL);
@@ -275,7 +293,7 @@ public:
 		env->CallVoidMethod(lcData->listener
 							,lcData->callStateId
 							,lcData->core
-							,env->NewObject(lcData->callClass,lcData->callCtrId,(jlong)call)
+							,lcData->getCall(env,call)
 							,env->CallStaticObjectMethod(lcData->callStateClass,lcData->callStateFromIntId,(jint)state),
 							message ? env->NewStringUTF(message) : NULL);
 	}
@@ -290,7 +308,7 @@ public:
 		env->CallVoidMethod(lcData->listener
 							,lcData->callEncryptionChangedId
 							,lcData->core
-							,env->NewObject(lcData->callClass,lcData->callCtrId,(jlong)call)
+							,lcData->getCall(env,call)
 							,encrypted
 							,authentication_token ? env->NewStringUTF(authentication_token) : NULL);
 	}
@@ -640,11 +658,13 @@ extern "C" jboolean Java_org_linphone_core_LinphoneCoreImpl_isEchoCancellationEn
 	return linphone_core_echo_cancellation_enabled((LinphoneCore*)lc);
 }
 
-extern "C" jlong Java_org_linphone_core_LinphoneCoreImpl_getCurrentCall(JNIEnv*  env
+extern "C" jobject Java_org_linphone_core_LinphoneCoreImpl_getCurrentCall(JNIEnv*  env
 																			,jobject  thiz
 																			,jlong lc
 																			) {
-	return (jlong)linphone_core_get_current_call((LinphoneCore*)lc);
+	LinphoneCoreData *lcdata=(LinphoneCoreData*)linphone_core_get_user_data((LinphoneCore*)lc);
+	
+	return lcdata->getCall(env,linphone_core_get_current_call((LinphoneCore*)lc));
 }
 extern "C" void Java_org_linphone_core_LinphoneCoreImpl_addFriend(JNIEnv*  env
 																			,jobject  thiz
@@ -1003,16 +1023,18 @@ extern "C" jint Java_org_linphone_core_PayloadTypeImpl_getRate(JNIEnv*  env,jobj
 }
 
 //LinphoneCall
-extern "C" void Java_org_linphone_core_LinphoneCallImpl_ref(JNIEnv*  env
+extern "C" void Java_org_linphone_core_LinphoneCallImpl_finalize(JNIEnv*  env
 																		,jobject  thiz
 																		,jlong ptr) {
-	linphone_call_ref((LinphoneCall*)ptr);
-}
-
-extern "C" void Java_org_linphone_core_LinphoneCallImpl_unref(JNIEnv*  env
-																		,jobject  thiz
-																		,jlong ptr) {
-	linphone_call_unref((LinphoneCall*)ptr);
+	LinphoneCall *call=(LinphoneCall*)ptr;	
+	jobject jobj=(jobject)linphone_call_get_user_pointer(call);
+	if (jobj==thiz){
+		//env->DeleteGlobalRef(jobj);
+	}else{
+		ms_error("Call being destroyed is inconsistent: thiz=%lu, jobj=%lu",(unsigned long)thiz,(unsigned long)jobj);
+	}
+	linphone_call_set_user_pointer(call,NULL);
+	linphone_call_unref(call);
 }
 
 extern "C" jlong Java_org_linphone_core_LinphoneCallImpl_getCallLog(	JNIEnv*  env