diff --git a/src/android/org/linphone/LinphonePreferences.java b/src/android/org/linphone/LinphonePreferences.java
index dc3d573f4..fe59e44b5 100644
--- a/src/android/org/linphone/LinphonePreferences.java
+++ b/src/android/org/linphone/LinphonePreferences.java
@@ -152,6 +152,7 @@ public class LinphonePreferences {
 
 	// Accounts settings
 	private ProxyConfig getProxyConfig(int n) {
+		if (getLc() == null) return null;
 		ProxyConfig[] prxCfgs = getLc().getProxyConfigList();
 		if (n < 0 || n >= prxCfgs.length)
 			return null;
@@ -171,6 +172,7 @@ public class LinphonePreferences {
 	 * Useful to edit a authInfo (you should call saveAuthInfo after the modifications to save them).
 	 */
 	private AuthInfo getClonedAuthInfo(int n) {
+		if (getLc() == null) return null;
 		AuthInfo authInfo = getAuthInfo(n);
 		if (authInfo == null)
 			return null;
@@ -185,6 +187,7 @@ public class LinphonePreferences {
 	 * Useful to save the changes made to a cloned authInfo.
 	 */
 	private void saveAuthInfo(AuthInfo authInfo) {
+		if (getLc() == null) return;
 		getLc().addAuthInfo(authInfo);
 	}
 
@@ -339,8 +342,12 @@ public class LinphonePreferences {
 					proxy = tempProxy;
 				}
 			}
+
 			Address proxyAddr = Factory.instance().createAddress(proxy);
 			Address identityAddr = Factory.instance().createAddress(identity);
+			if (proxyAddr == null || identityAddr == null) {
+				throw new CoreException("Proxy or Identity address is null !");
+			}
 
 			if (tempDisplayName != null) {
 				identityAddr.setDisplayName(tempDisplayName);
@@ -539,6 +546,7 @@ public class LinphonePreferences {
 	}
 
 	private void setAccountPassword(int n, String password, String ha1) {
+		if (getLc() == null) return;
 		String user = getAccountUsername(n);
 		String domain = getAccountDomain(n);
 		String userid = null;
@@ -632,6 +640,8 @@ public class LinphonePreferences {
 		}
 
 		Address proxyAddr = Factory.instance().createAddress(proxy);
+		if (proxyAddr == null) return;
+
 		if (!proxy.contains("transport=")) {
 			proxyAddr.setTransport(getAccountTransport(n));
 		}
@@ -758,6 +768,7 @@ public class LinphonePreferences {
 	}
 
 	public void setDefaultAccount(int accountIndex) {
+		if (getLc() == null) return;
 		ProxyConfig[] prxCfgs = getLc().getProxyConfigList();
 		if (accountIndex >= 0 && accountIndex < prxCfgs.length)
 			getLc().setDefaultProxyConfig(prxCfgs[accountIndex]);
@@ -787,6 +798,7 @@ public class LinphonePreferences {
 	}
 
 	public void setAccountEnabled(int n, boolean enabled) {
+		if (getLc() == null) return;
 		ProxyConfig prxCfg = getProxyConfig(n);
 		if (prxCfg == null) {
 			LinphoneUtils.displayErrorAlert(getString(R.string.error), mContext);
@@ -815,6 +827,7 @@ public class LinphonePreferences {
 	}
 
 	public void resetDefaultProxyConfig(){
+		if (getLc() == null) return;
 		int count = getLc().getProxyConfigList().length;
 		for (int i = 0; i < count; i++) {
 			if (isAccountEnabled(i)) {
@@ -829,6 +842,7 @@ public class LinphonePreferences {
 	}
 
 	public void deleteAccount(int n) {
+		if (getLc() == null) return;
 		ProxyConfig proxyCfg = getProxyConfig(n);
 		if (proxyCfg != null)
 			getLc().removeProxyConfig(proxyCfg);
@@ -849,10 +863,12 @@ public class LinphonePreferences {
 
 	// Audio settings
 	public void setEchoCancellation(boolean enable) {
+		if (getLc() == null) return;
 		getLc().enableEchoCancellation(enable);
 	}
 
 	public boolean echoCancellationEnabled() {
+		if (getLc() == null) return false;
 		return getLc().echoCancellationEnabled();
 	}
 
@@ -879,42 +895,50 @@ public class LinphonePreferences {
 	}
 
 	public boolean isVideoEnabled() {
+		if (getLc() == null) return false;
 		return getLc().videoSupported() && getLc().videoEnabled();
 	}
 
 	public void enableVideo(boolean enable) {
+		if (getLc() == null) return;
 		getLc().enableVideoCapture(enable);
 		getLc().enableVideoDisplay(enable);
 	}
 
 	public boolean shouldInitiateVideoCall() {
+		if (getLc() == null) return false;
 		return getLc().getVideoActivationPolicy().getAutomaticallyInitiate();
 	}
 
 	public void setInitiateVideoCall(boolean initiate) {
+		if (getLc() == null) return;
 		VideoActivationPolicy vap = getLc().getVideoActivationPolicy();
 		vap.setAutomaticallyInitiate(initiate);
 		getLc().setVideoActivationPolicy(vap);
 	}
 
 	public boolean shouldAutomaticallyAcceptVideoRequests() {
+		if (getLc() == null) return false;
 		VideoActivationPolicy vap = getLc().getVideoActivationPolicy();
 		return vap.getAutomaticallyAccept();
 	}
 
 	public void setAutomaticallyAcceptVideoRequests(boolean accept) {
+		if (getLc() == null) return;
 		VideoActivationPolicy vap = getLc().getVideoActivationPolicy();
 		vap.setAutomaticallyAccept(accept);
 		getLc().setVideoActivationPolicy(vap);
 	}
 
 	public String getVideoPreset() {
+		if (getLc() == null) return null;
 		String preset = getLc().getVideoPreset();
 		if (preset == null) preset = "default";
 		return preset;
 	}
 
 	public void setVideoPreset(String preset) {
+		if (getLc() == null) return;
 		if (preset.equals("default")) preset = null;
 		getLc().setVideoPreset(preset);
 		preset = getVideoPreset();
@@ -930,22 +954,27 @@ public class LinphonePreferences {
 	}
 
 	public void setPreferredVideoSize(String preferredVideoSize) {
+		if (getLc() == null) return;
 		getLc().setPreferredVideoSizeByName(preferredVideoSize);
 	}
 
 	public int getPreferredVideoFps() {
+		if (getLc() == null) return 0;
 		return (int)getLc().getPreferredFramerate();
 	}
 
 	public void setPreferredVideoFps(int fps) {
+		if (getLc() == null) return;
 		getLc().setPreferredFramerate(fps);
 	}
 
 	public int getBandwidthLimit() {
+		if (getLc() == null) return 0;
 		return getLc().getDownloadBandwidth();
 	}
 
 	public void setBandwidthLimit(int bandwidth) {
+		if (getLc() == null) return;
 		getLc().setUploadBandwidth(bandwidth);
 		getLc().setDownloadBandwidth(bandwidth);
 	}
@@ -953,34 +982,42 @@ public class LinphonePreferences {
 
 	// Call settings
 	public boolean useRfc2833Dtmfs() {
+		if (getLc() == null) return false;
 		return getLc().getUseRfc2833ForDtmf();
 	}
 
 	public void sendDtmfsAsRfc2833(boolean use) {
+		if (getLc() == null) return;
 		getLc().setUseRfc2833ForDtmf(use);
 	}
 
 	public boolean useSipInfoDtmfs() {
+		if (getLc() == null) return false;
 		return getLc().getUseInfoForDtmf();
 	}
 
 	public void sendDTMFsAsSipInfo(boolean use) {
+		if (getLc() == null) return;
 		getLc().setUseInfoForDtmf(use);
 	}
 
 	public int getIncTimeout() {
+		if (getLc() == null) return 0;
 		return getLc().getIncTimeout();
 	}
 
 	public void setIncTimeout(int timeout) {
+		if (getLc() == null) return;
 		getLc().setIncTimeout(timeout);
 	}
 
 	public int getInCallTimeout() {
+		if (getLc() == null) return 0;
 		return getLc().getInCallTimeout();
 	}
 
 	public void setInCallTimeout(int timeout) {
+		if (getLc() == null) return;
 		getLc().setInCallTimeout(timeout);
 	}
 
@@ -1030,6 +1067,7 @@ public class LinphonePreferences {
 	}
 
 	public String getSipPort() {
+		if (getLc() == null) return null;
 		Transports transports = getLc().getTransports();
 		int port;
 		if (transports.getUdpPort() > 0)
@@ -1040,6 +1078,7 @@ public class LinphonePreferences {
 	}
 
 	public void setSipPort(int port) {
+		if (getLc() == null) return;
 		Transports transports = getLc().getTransports();
 		transports.setUdpPort(port);
 		transports.setTcpPort(port);
@@ -1048,6 +1087,7 @@ public class LinphonePreferences {
 	}
 
 	private NatPolicy getOrCreateNatPolicy() {
+		if (getLc() == null) return null;
 		NatPolicy nat = getLc().getNatPolicy();
 		if (nat == null) {
 			nat = getLc().createNatPolicy();
@@ -1061,6 +1101,7 @@ public class LinphonePreferences {
 	}
 
 	public void setStunServer(String stun) {
+		if (getLc() == null) return;
 		NatPolicy nat = getOrCreateNatPolicy();
 		nat.setStunServer(stun);
 
@@ -1070,6 +1111,7 @@ public class LinphonePreferences {
 	}
 
 	public void setIceEnabled(boolean enabled) {
+		if (getLc() == null) return;
 		NatPolicy nat = getOrCreateNatPolicy();
 		nat.enableIce(enabled);
 		nat.enableStun(enabled);
@@ -1077,12 +1119,14 @@ public class LinphonePreferences {
 	}
 
 	public void setTurnEnabled(boolean enabled) {
+		if (getLc() == null) return;
 		NatPolicy nat = getOrCreateNatPolicy();
 		nat.enableTurn(enabled);
 		getLc().setNatPolicy(nat);
 	}
 
 	public void setUpnpEnabled(boolean enabled) {
+		if (getLc() == null) return;
 		NatPolicy nat = getOrCreateNatPolicy();
 		nat.enableUpnp(enabled);
 		getLc().setNatPolicy(nat);
@@ -1109,6 +1153,7 @@ public class LinphonePreferences {
 	}
 
 	public void setTurnUsername(String username) {
+		if (getLc() == null) return;
 		NatPolicy nat = getOrCreateNatPolicy();
 		AuthInfo authInfo = getLc().findAuthInfo(null, nat.getStunServerUsername(), null);
 
@@ -1127,6 +1172,7 @@ public class LinphonePreferences {
 	}
 
 	public void setTurnPassword(String password) {
+		if (getLc() == null) return;
 		NatPolicy nat = getOrCreateNatPolicy();
 		AuthInfo authInfo = getLc().findAuthInfo(null, nat.getStunServerUsername(), null);
 
@@ -1142,10 +1188,12 @@ public class LinphonePreferences {
 	}
 
 	public MediaEncryption getMediaEncryption() {
+		if (getLc() == null) return null;
 		return getLc().getMediaEncryption();
 	}
 
 	public void setMediaEncryption(MediaEncryption menc) {
+		if (getLc() == null) return;
 		if (menc == null)
 			return;
 
@@ -1166,6 +1214,7 @@ public class LinphonePreferences {
 			 String appId = getString(R.string.push_sender_id);
 			 if (regId != null && lc.getProxyConfigList().length > 0) {
 				 for (ProxyConfig lpc : lc.getProxyConfigList()) {
+					 if (lpc == null) continue;
 					 if (!lpc.isPushNotificationAllowed()) {
 						 lpc.edit();
 						 lpc.setContactUriParameters(null);
@@ -1215,10 +1264,12 @@ public class LinphonePreferences {
 	}
 
 	public void useIpv6(Boolean enable) {
+		if (getLc() == null) return;
 		 getLc().enableIpv6(enable);
 	}
 
 	public boolean isUsingIpv6() {
+		if (getLc() == null) return false;
 		return getLc().ipv6Enabled();
 	}
 	// End of network settings
@@ -1259,14 +1310,17 @@ public class LinphonePreferences {
 	}
 
 	public String getSharingPictureServerUrl() {
+		if (getLc() == null) return null;
 		return getLc().getFileTransferServer();
 	}
 
 	public void setSharingPictureServerUrl(String url) {
+		if (getLc() == null) return;
 		getLc().setFileTransferServer(url);
 	}
 
 	public void setRemoteProvisioningUrl(String url) {
+		if (getLc() == null) return;
 		if (url != null && url.length() == 0) {
 			url = null;
 		}
@@ -1274,26 +1328,31 @@ public class LinphonePreferences {
 	}
 
 	public String getRemoteProvisioningUrl() {
+		if (getLc() == null) return null;
 		return getLc().getProvisioningUri();
 	}
 
 	public void setDefaultDisplayName(String displayName) {
+		if (getLc() == null) return;
 		Address primary = getLc().getPrimaryContactParsed();
 		primary.setDisplayName(displayName);
 		getLc().setPrimaryContact(primary.asString());
 	}
 
 	public String getDefaultDisplayName() {
+		if (getLc() == null) return null;
 		return getLc().getPrimaryContactParsed().getDisplayName();
 	}
 
 	public void setDefaultUsername(String username) {
+		if (getLc() == null) return;
 		Address primary = getLc().getPrimaryContactParsed();
 		primary.setUsername(username);
 		getLc().setPrimaryContact(primary.asString());
 	}
 
 	public String getDefaultUsername() {
+		if (getLc() == null) return null;
 		return getLc().getPrimaryContactParsed().getUsername();
 	}
 	// End of advanced settings
@@ -1302,6 +1361,7 @@ public class LinphonePreferences {
 	private TunnelConfig tunnelConfig = null;
 
 	public TunnelConfig getTunnelConfig() {
+		if (getLc() == null) return null;
 		if(getLc().tunnelAvailable()) {
 			Tunnel tunnel = getLc().getTunnel();
 			if (tunnelConfig == null) {
@@ -1384,10 +1444,12 @@ public class LinphonePreferences {
 	}
 
 	public boolean adaptiveRateControlEnabled() {
+		if (getLc() == null) return false;
 		return getLc().adaptiveRateControlEnabled();
 	}
 
 	public void enableAdaptiveRateControl(boolean enabled) {
+		if (getLc() == null) return;
 		getLc().enableAdaptiveRateControl(enabled);
 	}
 
@@ -1501,10 +1563,12 @@ public class LinphonePreferences {
 	}
 
 	public LimeState limeEnabled() {
+		if (getLc() == null) return LimeState.Disabled;
 		return getLc().limeEnabled();
 	}
 
 	public void enableLime(LimeState lime) {
+		if (getLc() == null) return;
 		getLc().enableLime(lime);
 	}
 
diff --git a/src/android/org/linphone/LinphoneUtils.java b/src/android/org/linphone/LinphoneUtils.java
index badb3532e..ab6057a1e 100644
--- a/src/android/org/linphone/LinphoneUtils.java
+++ b/src/android/org/linphone/LinphoneUtils.java
@@ -843,6 +843,8 @@ public final class LinphoneUtils {
     }
 
 	public static Spanned getTextWithHttpLinks(String text) {
+		if (text == null) return null;
+		
 		if (text.contains("<")) {
 			text = text.replace("<", "&lt;");
 		}
diff --git a/src/android/org/linphone/activities/LinphoneActivity.java b/src/android/org/linphone/activities/LinphoneActivity.java
index 9ae6da739..136e1c55d 100644
--- a/src/android/org/linphone/activities/LinphoneActivity.java
+++ b/src/android/org/linphone/activities/LinphoneActivity.java
@@ -279,8 +279,11 @@ public class LinphoneActivity extends LinphoneGenericActivity implements OnClick
 			}
 		};
 
-		int missedCalls = (LinphoneManager.isInstanciated()) ? LinphoneManager.getLc().getMissedCallsCount() : 0;
-		displayMissedCalls(missedCalls);
+		Core lc = LinphoneManager.getLcIfManagerNotDestroyedOrNull();
+		if (lc != null) {
+			int missedCalls = lc.getMissedCallsCount();
+			displayMissedCalls(missedCalls);
+		}
 
 		int rotation = getWindowManager().getDefaultDisplay().getRotation();
 		switch (rotation) {
diff --git a/src/android/org/linphone/call/CallActivity.java b/src/android/org/linphone/call/CallActivity.java
index e97a50ef5..fb8f2d218 100644
--- a/src/android/org/linphone/call/CallActivity.java
+++ b/src/android/org/linphone/call/CallActivity.java
@@ -521,7 +521,10 @@ public class CallActivity extends LinphoneGenericActivity implements OnClickList
 			}
 		});
 
-		initCallStatsRefresher(LinphoneManager.getLc().getCurrentCall(), findViewById(R.id.incall_stats));
+		Core lc = LinphoneManager.getLcIfManagerNotDestroyedOrNull();
+		if (lc != null) {
+			initCallStatsRefresher(lc.getCurrentCall(), findViewById(R.id.incall_stats));
+		}
 	}
 
 	private void refreshIncallUi(){
diff --git a/src/android/org/linphone/chat/GroupChatFragment.java b/src/android/org/linphone/chat/GroupChatFragment.java
index 2c822a055..564da2880 100644
--- a/src/android/org/linphone/chat/GroupChatFragment.java
+++ b/src/android/org/linphone/chat/GroupChatFragment.java
@@ -278,7 +278,7 @@ public class GroupChatFragment extends Fragment implements ChatRoomListener, Con
 		removeVirtualKeyboardVisiblityListener();
 		LinphoneManager.getInstance().setCurrentChatRoomAddress(null);
 		if (mChatRoom != null) mChatRoom.removeListener(this);
-		mEventsAdapter.clear();
+		if (mEventsAdapter != null) mEventsAdapter.clear();
 		super.onPause();
 	}
 
diff --git a/src/android/org/linphone/contacts/ContactDetailsFragment.java b/src/android/org/linphone/contacts/ContactDetailsFragment.java
index d830dd381..2325435cf 100644
--- a/src/android/org/linphone/contacts/ContactDetailsFragment.java
+++ b/src/android/org/linphone/contacts/ContactDetailsFragment.java
@@ -75,19 +75,21 @@ public class ContactDetailsFragment extends Fragment implements OnClickListener
 				String tag = (String)v.getTag();
 				Core lc = LinphoneManager.getLc();
 				Address participant = Factory.instance().createAddress(tag);
-				ChatRoom room = lc.findOneToOneChatRoom(lc.getDefaultProxyConfig().getContact(), participant);
-				if (room != null) {
-					LinphoneActivity.instance().goToChat(room.getPeerAddress().asStringUriOnly(), null);
-				} else {
-					ProxyConfig lpc = lc.getDefaultProxyConfig();
-					if (lpc != null && lpc.getConferenceFactoryUri() != null && !LinphonePreferences.instance().useBasicChatRoomFor1To1()) {
-						mWaitLayout.setVisibility(View.VISIBLE);
-						mChatRoom = lc.createClientGroupChatRoom(getString(R.string.dummy_group_chat_subject), true);
-						mChatRoom.addListener(mChatRoomCreationListener);
-						mChatRoom.addParticipant(participant);
-					} else {
-						room = lc.getChatRoom(participant);
+				ProxyConfig defaultProxyConfig = lc.getDefaultProxyConfig();
+				if (defaultProxyConfig != null) {
+					ChatRoom room = lc.findOneToOneChatRoom(defaultProxyConfig.getContact(), participant);
+					if (room != null) {
 						LinphoneActivity.instance().goToChat(room.getPeerAddress().asStringUriOnly(), null);
+					} else {
+						if (defaultProxyConfig.getConferenceFactoryUri() != null && !LinphonePreferences.instance().useBasicChatRoomFor1To1()) {
+							mWaitLayout.setVisibility(View.VISIBLE);
+							mChatRoom = lc.createClientGroupChatRoom(getString(R.string.dummy_group_chat_subject), true);
+							mChatRoom.addListener(mChatRoomCreationListener);
+							mChatRoom.addParticipant(participant);
+						} else {
+							room = lc.getChatRoom(participant);
+							LinphoneActivity.instance().goToChat(room.getPeerAddress().asStringUriOnly(), null);
+						}
 					}
 				}
 			}
diff --git a/src/android/org/linphone/contacts/LinphoneContact.java b/src/android/org/linphone/contacts/LinphoneContact.java
index 0c5f5399a..54b9671bf 100644
--- a/src/android/org/linphone/contacts/LinphoneContact.java
+++ b/src/android/org/linphone/contacts/LinphoneContact.java
@@ -414,9 +414,10 @@ public class LinphoneContact implements Serializable, Comparable<LinphoneContact
 	private void createOrUpdateFriend() {
 		boolean created = false;
 		Core lc = LinphoneManager.getLcIfManagerNotDestroyedOrNull();
+		if (lc == null) return;
 
 		if (!isFriend()) {
-			friend = LinphoneManager.getLc().createFriend();
+			friend = lc.createFriend();
 			friend.enableSubscribes(false);
 			friend.setIncSubscribePolicy(SubscribePolicy.SPDeny);
 			if (isAndroidContact()) {
diff --git a/src/android/org/linphone/contacts/LinphoneNumberOrAddress.java b/src/android/org/linphone/contacts/LinphoneNumberOrAddress.java
index f40f75d45..7a65c0fc5 100644
--- a/src/android/org/linphone/contacts/LinphoneNumberOrAddress.java
+++ b/src/android/org/linphone/contacts/LinphoneNumberOrAddress.java
@@ -40,8 +40,9 @@ public class LinphoneNumberOrAddress implements Serializable, Comparable<Linphon
 
 	@Override
 	public int compareTo(LinphoneNumberOrAddress noa) {
-		if (noa.isSIPAddress() == isSIPAddress() && noa.getValue() != null) {
-			return noa.getValue().compareTo(getValue());
+		String value = noa.getValue();
+		if (noa.isSIPAddress() == isSIPAddress() && value != null) {
+			return value.compareTo(getValue());
 		} else {
 			return isSIPAddress() ? -1 : 1;
 		}
diff --git a/src/android/org/linphone/contacts/SearchContactsListAdapter.java b/src/android/org/linphone/contacts/SearchContactsListAdapter.java
index e723294e1..e859ccf0a 100644
--- a/src/android/org/linphone/contacts/SearchContactsListAdapter.java
+++ b/src/android/org/linphone/contacts/SearchContactsListAdapter.java
@@ -183,7 +183,7 @@ public class SearchContactsListAdapter extends BaseAdapter {
 			}
 			if (sr.getAddress() != null || sr.getPhoneNumber() != null) {
 				for (ContactAddress ca : result) {
-					String normalizedPhoneNumber = (ca.getPhoneNumber() != null) ? prx.normalizePhoneNumber(ca.getPhoneNumber()) : null;
+					String normalizedPhoneNumber = (ca != null && ca.getPhoneNumber() != null && prx != null) ? prx.normalizePhoneNumber(ca.getPhoneNumber()) : null;
 					if ((sr.getAddress() != null && ca.getAddress() != null
 							&& ca.getAddress().asStringUriOnly().equals(sr.getAddress().asStringUriOnly()))
 						|| (sr.getPhoneNumber() != null && normalizedPhoneNumber != null
diff --git a/src/android/org/linphone/fragments/HistoryListFragment.java b/src/android/org/linphone/fragments/HistoryListFragment.java
index 70cb2e7a0..e73dec9d4 100644
--- a/src/android/org/linphone/fragments/HistoryListFragment.java
+++ b/src/android/org/linphone/fragments/HistoryListFragment.java
@@ -542,7 +542,9 @@ public class HistoryListFragment extends Fragment implements OnClickListener, On
 							} else {
 								address = log.getToAddress();
 							}
-							LinphoneActivity.instance().setAddresGoToDialerAndCall(address.asStringUriOnly(), address.getDisplayName(), null);
+							if (address != null) {
+								LinphoneActivity.instance().setAddresGoToDialerAndCall(address.asStringUriOnly(), address.getDisplayName(), null);
+							}
 						}
 					}
 				});
diff --git a/src/android/org/linphone/fragments/SettingsFragment.java b/src/android/org/linphone/fragments/SettingsFragment.java
index 284d3a99b..4768a662e 100644
--- a/src/android/org/linphone/fragments/SettingsFragment.java
+++ b/src/android/org/linphone/fragments/SettingsFragment.java
@@ -526,33 +526,35 @@ public class SettingsFragment extends PreferencesListFragment {
 		codecs.removeAll();
 
 		Core lc = LinphoneManager.getLcIfManagerNotDestroyedOrNull();
-		for (final PayloadType pt : lc.getAudioPayloadTypes()) {
-			CheckBoxPreference codec = new CheckBoxPreference(getActivity());
-			codec.setTitle(pt.getMimeType());
-			/* Special case */
-			if (pt.getMimeType().equals("mpeg4-generic")) {
-				if (android.os.Build.VERSION.SDK_INT < 16) {
-					/* Make sure AAC is disabled */
-					pt.enable(false);
-					continue;
-				} else {
-					codec.setTitle("AAC-ELD");
+		if (lc != null) {
+			for (final PayloadType pt : lc.getAudioPayloadTypes()) {
+				CheckBoxPreference codec = new CheckBoxPreference(getActivity());
+				codec.setTitle(pt.getMimeType());
+				/* Special case */
+				if (pt.getMimeType().equals("mpeg4-generic")) {
+					if (android.os.Build.VERSION.SDK_INT < 16) {
+						/* Make sure AAC is disabled */
+						pt.enable(false);
+						continue;
+					} else {
+						codec.setTitle("AAC-ELD");
+					}
 				}
+
+				codec.setSummary(pt.getClockRate() + " Hz");
+				codec.setDefaultValue(pt.enabled());
+
+				codec.setOnPreferenceChangeListener(new OnPreferenceChangeListener() {
+					@Override
+					public boolean onPreferenceChange(Preference preference, Object newValue) {
+						boolean enable = (Boolean) newValue;
+						pt.enable(enable);
+						return true;
+					}
+				});
+
+				codecs.addPreference(codec);
 			}
-
-			codec.setSummary(pt.getClockRate() + " Hz");
-			codec.setDefaultValue(pt.enabled());
-
-			codec.setOnPreferenceChangeListener(new OnPreferenceChangeListener() {
-				@Override
-				public boolean onPreferenceChange(Preference preference, Object newValue) {
-					boolean enable = (Boolean) newValue;
-					pt.enable(enable);
-					return true;
-				}
-			});
-
-			codecs.addPreference(codec);
 		}
 
 		CheckBoxPreference echoCancellation = (CheckBoxPreference) findPreference(getString(R.string.pref_echo_cancellation_key));
@@ -1062,8 +1064,13 @@ public class SettingsFragment extends PreferencesListFragment {
 			@Override
 			public boolean onPreferenceChange(Preference preference, Object newValue) {
 				String value = (String)newValue;
-				mPrefs.setIncTimeout(Integer.valueOf(value));
-				preference.setSummary(value);
+				try {
+					mPrefs.setIncTimeout(Integer.valueOf(value));
+					preference.setSummary(value);
+				} catch (NumberFormatException nfe) {
+					Log.e("Value is not an Integer ! " + value);
+					return false;
+				}
 				return true;
 			}
 		});
diff --git a/src/android/org/linphone/receivers/PhoneStateChangedReceiver.java b/src/android/org/linphone/receivers/PhoneStateChangedReceiver.java
index 3acd5101a..27cb24a47 100644
--- a/src/android/org/linphone/receivers/PhoneStateChangedReceiver.java
+++ b/src/android/org/linphone/receivers/PhoneStateChangedReceiver.java
@@ -24,6 +24,8 @@ import android.content.Context;
 import android.content.Intent;
 import android.telephony.TelephonyManager;
 
+import org.linphone.core.Core;
+
 import org.linphone.LinphoneManager;
 
 /**
@@ -39,7 +41,8 @@ public class PhoneStateChangedReceiver extends BroadcastReceiver {
 
 		if (TelephonyManager.EXTRA_STATE_OFFHOOK.equals(extraState) || TelephonyManager.EXTRA_STATE_RINGING.equals(extraState)) {
 			LinphoneManager.getInstance().setCallGsmON(true);
-			LinphoneManager.getLc().pauseAllCalls();
+			Core lc = LinphoneManager.getLcIfManagerNotDestroyedOrNull();
+			lc.pauseAllCalls();
         } else if (TelephonyManager.EXTRA_STATE_IDLE.equals(extraState)) {
 			LinphoneManager.getInstance().setCallGsmON(false);
         }
diff --git a/src/android/org/linphone/ui/ListSelectionHelper.java b/src/android/org/linphone/ui/ListSelectionHelper.java
index 490fc4ef8..15e800a8c 100644
--- a/src/android/org/linphone/ui/ListSelectionHelper.java
+++ b/src/android/org/linphone/ui/ListSelectionHelper.java
@@ -64,7 +64,7 @@ public class ListSelectionHelper {
 		mEditButton.setOnClickListener(new View.OnClickListener() {
 			@Override
 			public void onClick(View v) {
-				if (mAdapter.getCount() > 0) {
+				if (mAdapter != null && mAdapter.getCount() > 0) {
 					mAdapter.enableEdition(true);
 					mTopBar.setVisibility(View.GONE);
 					mEditTopBar.setVisibility(View.VISIBLE);