diff --git a/Classes/LinphoneAppDelegate.m b/Classes/LinphoneAppDelegate.m
index 47856aefc..5465b209f 100644
--- a/Classes/LinphoneAppDelegate.m
+++ b/Classes/LinphoneAppDelegate.m
@@ -82,22 +82,30 @@ int __aeabi_idiv(int a, int b) {
     }
 }
 
+- (void)applicationDidEnterBackground:(UIApplication *)application{
+	[LinphoneLogger logc:LinphoneLoggerLog format:"applicationDidEnterBackground"];
+	if(![LinphoneManager isLcReady]) return;
+	[[LinphoneManager instance] enterBackgroundMode];
+}
+
 - (void)applicationWillResignActive:(UIApplication *)application {
+	[LinphoneLogger logc:LinphoneLoggerLog format:"applicationWillResignActive"];
     if(![LinphoneManager isLcReady]) return;
     LinphoneCore* lc = [LinphoneManager getLc];
     LinphoneCall* call = linphone_core_get_current_call(lc);
-    if (call == NULL)
-        return;
+	
+	
+    if (call){
+		/* save call context */
+		LinphoneManager* instance = [LinphoneManager instance];
+		instance->currentCallContextBeforeGoingBackground.call = call;
+		instance->currentCallContextBeforeGoingBackground.cameraIsEnabled = linphone_call_camera_enabled(call);
     
-    /* save call context */
-    LinphoneManager* instance = [LinphoneManager instance];
-    instance->currentCallContextBeforeGoingBackground.call = call;
-    instance->currentCallContextBeforeGoingBackground.cameraIsEnabled = linphone_call_camera_enabled(call);
-    
-    const LinphoneCallParams* params = linphone_call_get_current_params(call);
-    if (linphone_call_params_video_enabled(params)) {
-        linphone_call_enable_camera(call, false);
-    }
+		const LinphoneCallParams* params = linphone_call_get_current_params(call);
+		if (linphone_call_params_video_enabled(params)) {
+			linphone_call_enable_camera(call, false);
+		}
+	}
     
     if (![[LinphoneManager instance] resignActive]) {
         // destroying eventHandler if app cannot go in background.
@@ -111,7 +119,8 @@ int __aeabi_idiv(int a, int b) {
     
 }
 
-- (void)applicationDidBecomeActive:(UIApplication *)application {   
+- (void)applicationDidBecomeActive:(UIApplication *)application {
+	[LinphoneLogger logc:LinphoneLoggerLog format:"applicationDidBecomeActive"];
     [self startApplication];
     
 	[[LinphoneManager instance] becomeActive];
@@ -121,19 +130,19 @@ int __aeabi_idiv(int a, int b) {
     
     LinphoneCore* lc = [LinphoneManager getLc];
     LinphoneCall* call = linphone_core_get_current_call(lc);
-    if (call == NULL)
-        return;
     
-    LinphoneManager* instance = [LinphoneManager instance];
-    if (call == instance->currentCallContextBeforeGoingBackground.call) {
-        const LinphoneCallParams* params = linphone_call_get_current_params(call);
-        if (linphone_call_params_video_enabled(params)) {
-            linphone_call_enable_camera(
+	if (call){
+		LinphoneManager* instance = [LinphoneManager instance];
+		if (call == instance->currentCallContextBeforeGoingBackground.call) {
+			const LinphoneCallParams* params = linphone_call_get_current_params(call);
+			if (linphone_call_params_video_enabled(params)) {
+				linphone_call_enable_camera(
                                         call, 
                                         instance->currentCallContextBeforeGoingBackground.cameraIsEnabled);
-        }
-        instance->currentCallContextBeforeGoingBackground.call = 0;
-    }
+			}
+			instance->currentCallContextBeforeGoingBackground.call = 0;
+		}
+	}
 }
 
 - (void)setupGSMInteraction {
diff --git a/Classes/LinphoneCoreSettingsStore.m b/Classes/LinphoneCoreSettingsStore.m
index acc6e1f55..86bd9814a 100644
--- a/Classes/LinphoneCoreSettingsStore.m
+++ b/Classes/LinphoneCoreSettingsStore.m
@@ -377,9 +377,9 @@ extern void linphone_iphone_log_handler(int lev, const char *fmt, va_list args);
 }
 
 - (BOOL)synchronize {
+	if (![LinphoneManager isLcReady]) return YES;
 	LinphoneCore *lc=[LinphoneManager getLc];
 	
-	if (lc==NULL) return YES;
 	BOOL account_changed;
 	
 	account_changed=[self valueChangedForKey:@"username_preference"] 
diff --git a/Classes/LinphoneManager.h b/Classes/LinphoneManager.h
index d1e847b60..34bcabc3c 100644
--- a/Classes/LinphoneManager.h
+++ b/Classes/LinphoneManager.h
@@ -107,6 +107,7 @@ typedef struct _LinphoneManagerSounds {
 - (void)destroyLibLinphone;
 - (BOOL)resignActive;
 - (void)becomeActive;
+- (BOOL)enterBackgroundMode;
 
 + (void)kickOffNetworkConnection;
 - (void)setupNetworkReachabilityCallback;
diff --git a/Classes/LinphoneManager.m b/Classes/LinphoneManager.m
index eb7884f15..e1fc78eb5 100644
--- a/Classes/LinphoneManager.m
+++ b/Classes/LinphoneManager.m
@@ -668,7 +668,8 @@ static LinphoneCoreVTable linphonec_vtable = {
     else
         ms_set_cpu_count(1);
     
-    settingsStore = [[LinphoneCoreSettingsStore alloc] init];
+	if (!settingsStore)
+		settingsStore = [[LinphoneCoreSettingsStore alloc] init];
     
     [LinphoneLogger logc:LinphoneLoggerWarning format:"Linphone [%s]  started on [%s]"
                ,linphone_core_get_version()
@@ -686,10 +687,12 @@ static LinphoneCoreVTable linphonec_vtable = {
 	[mIterateTimer invalidate]; 
 	AVAudioSession *audioSession = [AVAudioSession sharedInstance];
 	[audioSession setDelegate:nil];
+#if 0
     if (settingsStore != nil) {
         [settingsStore release];
         settingsStore = nil;
     }
+#endif
 	if (theLinphoneCore != nil) { //just in case application terminate before linphone core initialization
         [LinphoneLogger logc:LinphoneLoggerLog format:"Destroy linphonecore"];
 		linphone_core_destroy(theLinphoneCore);
@@ -705,19 +708,19 @@ static LinphoneCoreVTable linphonec_vtable = {
 - (BOOL)resignActive {
     if ([[LinphoneManager instance] settingsStore] != Nil)
 		[[[LinphoneManager instance] settingsStore] synchronize];
-    return [self enterBackgroundMode];
+	linphone_core_stop_dtmf_stream(theLinphoneCore);
+    return YES;
 }
 
 - (BOOL)enterBackgroundMode {
 	LinphoneProxyConfig* proxyCfg;
 	linphone_core_get_default_proxy(theLinphoneCore, &proxyCfg);	
-	linphone_core_stop_dtmf_stream(theLinphoneCore);
 	
-	if (proxyCfg && [settingsStore boolForKey:@"backgroundmode_preference"]) {
+	
+	if (proxyCfg && [[NSUserDefaults standardUserDefaults] boolForKey:@"backgroundmode_preference"]) {
 		//For registration register
 		linphone_core_refresh_registers(theLinphoneCore);
 		
-		
 		//wait for registration answer
 		int i=0;
 		while (!linphone_proxy_config_is_registered(proxyCfg) && i++<40 ) {
diff --git a/Settings/InAppSettings.bundle/Call.plist b/Settings/InAppSettings.bundle/Call.plist
index 8e0cb92ca..b5e1a7f6d 100644
--- a/Settings/InAppSettings.bundle/Call.plist
+++ b/Settings/InAppSettings.bundle/Call.plist
@@ -36,7 +36,7 @@
 			<key>Type</key>
 			<string>PSToggleSwitchSpecifier</string>
 			<key>Title</key>
-			<string>Enable RFC DTMF</string>
+			<string>Send inband DTMFs</string>
 			<key>Key</key>
 			<string>rfc_dtmf_preference</string>
 			<key>DefaultValue</key>
@@ -46,7 +46,7 @@
 			<key>Type</key>
 			<string>PSToggleSwitchSpecifier</string>
 			<key>Title</key>
-			<string>Enable SIPINFO DTMF</string>
+			<string>Send SIP INFO DTMFs</string>
 			<key>Key</key>
 			<string>sipinfo_dtmf_preference</string>
 			<key>DefaultValue</key>