diff --git a/src/org/linphone/LinphoneActivity.java b/src/org/linphone/LinphoneActivity.java
index 67466e288..bda409ea6 100644
--- a/src/org/linphone/LinphoneActivity.java
+++ b/src/org/linphone/LinphoneActivity.java
@@ -257,7 +257,7 @@ public class LinphoneActivity extends LinphoneGenericActivity implements OnClick
 			}
 		};
 
-		int missedCalls = (LinphoneManager.getInstance() != null) ? LinphoneManager.getLc().getMissedCallsCount() : 0;
+		int missedCalls = (LinphoneManager.isInstanciated()) ? LinphoneManager.getLc().getMissedCallsCount() : 0;
 		displayMissedCalls(missedCalls);
 
 		int rotation = getWindowManager().getDefaultDisplay().getRotation();
@@ -276,7 +276,7 @@ public class LinphoneActivity extends LinphoneGenericActivity implements OnClick
 			break;
 		}
 
-		if (LinphoneManager.getInstance() != null) {
+		if (LinphoneManager.isInstanciated()) {
 			LinphoneManager.getLc().setDeviceRotation(rotation);
 		}
 		mAlwaysChangingPhoneAngle = rotation;