diff --git a/Classes/linphoneAppDelegate.h b/Classes/linphoneAppDelegate.h
index 177fea373..eaed31802 100644
--- a/Classes/linphoneAppDelegate.h
+++ b/Classes/linphoneAppDelegate.h
@@ -47,6 +47,8 @@
 	
 	bool isDebug;
 	bool isStarted;
+	bool backgroundSupported;
+
 	LinphoneCore* myLinphoneCore;
 	SCNetworkReachabilityContext proxyReachabilityContext;
 	SCNetworkReachabilityRef proxyReachability;
diff --git a/Classes/linphoneAppDelegate.m b/Classes/linphoneAppDelegate.m
index 6ed2e8251..0e6d344ac 100644
--- a/Classes/linphoneAppDelegate.m
+++ b/Classes/linphoneAppDelegate.m
@@ -27,6 +27,10 @@
 #import "MoreViewController.h"
 
 extern void ms_au_register_card();
+void linphone_iphone_keepAliveHandler () { 
+	ms_message("keepalive handler invoked");
+};
+
 //generic log handler for debug version
 void linphone_iphone_log_handler(int lev, const char *fmt, va_list args){
 	NSString* format = [[NSString alloc] initWithCString:fmt encoding:[NSString defaultCStringEncoding]];
@@ -91,6 +95,20 @@ LinphoneCoreVTable linphonec_vtable = {
 @synthesize myPeoplePickerController;
 @synthesize myPhoneViewController;
 
+- (void)applicationDidEnterBackground:(UIApplication *)application {
+	
+	
+	if (backgroundSupported) {
+		if ([[UIApplication sharedApplication] setKeepAliveTimeout:(NSTimeInterval)300 
+														   handler:^{ms_warning("Handler invoked");}]) {
+			ms_warning("keepalive handler succesfully registered");
+		} else {
+			ms_warning("keepalive handler cannot be registered");
+		}
+		
+	}		
+	
+}
 
 
 - (void)applicationDidFinishLaunching:(UIApplication *)application {    
@@ -101,6 +119,10 @@ LinphoneCoreVTable linphonec_vtable = {
 #define HISTORY_TAB_INDEX 0
 #define MORE_TAB_INDEX 3
 	
+	UIDevice* device = [UIDevice currentDevice];
+	backgroundSupported = false;
+	if ([device respondsToSelector:@selector(isMultitaskingSupported)])
+		backgroundSupported = device.multitaskingSupported;
 	
 	myPhoneViewController = (PhoneViewController*) [myTabBarController.viewControllers objectAtIndex: DIALER_TAB_INDEX];
 	
@@ -313,6 +335,7 @@ extern void libmsilbc_init();
 		LinphoneAddress* addr=linphone_address_new(linphone_proxy_config_get_addr(proxyCfg));
 		proxyReachability=SCNetworkReachabilityCreateWithName(nil, linphone_address_get_domain(addr));
 		
+
 		
 		[self doRegister];
 	} else if (configCheckDisable == false) { 		
@@ -475,4 +498,5 @@ bool networkReachabilityCallBack(SCNetworkReachabilityRef target, SCNetworkReach
 	SCNetworkReachabilityGetFlags (proxyReachability,&reachabilityFlags);
 	networkReachabilityCallBack(proxyReachability,reachabilityFlags,self); 
 }
+
 @end
diff --git a/linphone-Info.plist b/linphone-Info.plist
index 51ba515eb..43aedc875 100644
--- a/linphone-Info.plist
+++ b/linphone-Info.plist
@@ -33,5 +33,10 @@
 		<string>wifi</string>
 		<string>microphone</string>
 	</array>
+	<key>UIBackgroundModes</key>
+	<array>
+		<string>audio</string>
+		<string>voip</string>
+	</array>
 </dict>
 </plist>
diff --git a/linphone.xcodeproj/project.pbxproj b/linphone.xcodeproj/project.pbxproj
index 67f86a4b9..aaed3e0ff 100755
--- a/linphone.xcodeproj/project.pbxproj
+++ b/linphone.xcodeproj/project.pbxproj
@@ -712,7 +712,7 @@
 				LINK_WITH_STANDARD_LIBRARIES = YES;
 				PREBINDING = NO;
 				"PROVISIONING_PROFILE[sdk=iphoneos*]" = "09801E17-63DB-47FD-A203-166EDD1E55A1";
-				SDKROOT = iphoneos3.1;
+				SDKROOT = iphoneos3.2;
 			};
 			name = Distribution;
 		};
@@ -753,7 +753,7 @@
 				LIBRARY_SEARCH_PATHS = "";
 				LINK_WITH_STANDARD_LIBRARIES = YES;
 				PREBINDING = NO;
-				SDKROOT = iphoneos3.1;
+				SDKROOT = iphoneos3.2;
 			};
 			name = Debug;
 		};
@@ -766,7 +766,7 @@
 				GCC_WARN_ABOUT_RETURN_TYPE = YES;
 				GCC_WARN_UNUSED_VARIABLE = YES;
 				PREBINDING = NO;
-				SDKROOT = iphoneos3.1;
+				SDKROOT = iphoneos3.2;
 			};
 			name = Release;
 		};