diff --git a/src/org/linphone/ContactDetailsFragment.java b/src/org/linphone/ContactDetailsFragment.java
index 809c19598..1a9120336 100644
--- a/src/org/linphone/ContactDetailsFragment.java
+++ b/src/org/linphone/ContactDetailsFragment.java
@@ -17,7 +17,6 @@ You should have received a copy of the GNU General Public License
 along with this program; if not, write to the Free Software
 Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 */
-import org.linphone.core.LinphoneCore;
 import org.linphone.core.LinphoneProxyConfig;
 
 import android.annotation.SuppressLint;
@@ -47,22 +46,7 @@ public class ContactDetailsFragment extends Fragment implements OnClickListener
 		@Override
 		public void onClick(View v) {
 			if (LinphoneActivity.isInstanciated()) {
-				LinphoneCore lc = LinphoneManager.getLcIfManagerNotDestroyedOrNull();
-				if (lc != null) {
-					LinphoneProxyConfig lpc = lc.getDefaultProxyConfig();
-					String to;
-					if (lpc != null) {
-						String address = v.getTag().toString();
-						if (!address.contains("@")) {
-							to = lpc.normalizePhoneNumber(address);
-						} else {
-							to = v.getTag().toString();
-						}
-					} else {
-						to = v.getTag().toString();
-					}
-					LinphoneActivity.instance().setAddresGoToDialerAndCall(to, contact.getFullName(), contact.getPhotoUri());
-				}
+				LinphoneActivity.instance().setAddresGoToDialerAndCall(v.getTag().toString(), contact.getFullName(), contact.getPhotoUri());
 			}
 		}
 	};
@@ -125,13 +109,7 @@ public class ContactDetailsFragment extends Fragment implements OnClickListener
 			boolean skip = false;
 			View v = inflater.inflate(R.layout.contact_control_row, null);
 			
-			String displayednumberOrAddress = noa.getValue();
-			if (displayednumberOrAddress.startsWith("sip:")) {
-				displayednumberOrAddress = displayednumberOrAddress.replace("sip:", "");
-			}
-			if (displayednumberOrAddress.contains("@")) {
-				displayednumberOrAddress = displayednumberOrAddress.split("@")[0];
-			}
+			String displayednumberOrAddress = LinphoneUtils.getDisplayableUsernameFromAddress(noa.getValue());
 
 			TextView label = (TextView) v.findViewById(R.id.address_label);
 			if (noa.isSIPAddress()) {
@@ -156,15 +134,8 @@ public class ContactDetailsFragment extends Fragment implements OnClickListener
 			v.findViewById(R.id.contact_chat).setOnClickListener(chatListener);
 			LinphoneProxyConfig lpc = LinphoneManager.getLc().getDefaultProxyConfig();
 			if (lpc != null) {
-				displayednumberOrAddress = lpc.normalizePhoneNumber(displayednumberOrAddress);
-				String tag = noa.getValue();
-				if (!tag.startsWith("sip:")) {
-					tag = "sip:" + tag;
-				}
-				
-				if (!tag.contains("@")) {
-					tag = tag + "@" + lpc.getDomain();
-				}
+				String username = lpc.normalizePhoneNumber(LinphoneUtils.getUsernameFromAddress(noa.getValue()));
+				String tag = LinphoneUtils.getFullAddressFromUsername(username);
 				v.findViewById(R.id.contact_chat).setTag(tag);
 			} else {
 				v.findViewById(R.id.contact_chat).setTag(noa.getValue());
diff --git a/src/org/linphone/ContactEditorFragment.java b/src/org/linphone/ContactEditorFragment.java
index 829145160..acbb4a057 100644
--- a/src/org/linphone/ContactEditorFragment.java
+++ b/src/org/linphone/ContactEditorFragment.java
@@ -25,8 +25,6 @@ import java.io.Serializable;
 import java.util.ArrayList;
 import java.util.List;
 
-import org.linphone.core.LinphoneCore;
-import org.linphone.core.LinphoneProxyConfig;
 import org.linphone.mediastream.Log;
 import org.linphone.mediastream.Version;
 
@@ -126,10 +124,6 @@ public class ContactEditorFragment extends Fragment {
 		ok.setOnClickListener(new OnClickListener() {
 			@Override
 			public void onClick(View v) {
-				LinphoneCore lc = LinphoneManager.getLcIfManagerNotDestroyedOrNull();
-				LinphoneProxyConfig lpc = lc != null ? lc.getDefaultProxyConfig() : null;
-				String defaultDomain = lpc != null ? lpc.getDomain() : null;
-				
 				if (isNewContact) {
 					boolean areAllFielsEmpty = true;
 					for (LinphoneNumberOrAddress nounoa : numbersAndAddresses) {
@@ -150,12 +144,7 @@ public class ContactEditorFragment extends Fragment {
 				}
 				for (LinphoneNumberOrAddress noa : numbersAndAddresses) {
 					if (noa.isSIPAddress() && noa.getValue() != null) {
-						if (!noa.getValue().contains("@") && defaultDomain != null) {
-							noa.setValue(noa.getValue() + "@" + defaultDomain);
-						}
-						if (!noa.getValue().startsWith("sip:")) {
-							noa.setValue("sip:" + noa.getValue());
-						}
+						noa.setValue(LinphoneUtils.getFullAddressFromUsername(noa.getValue()));
 					}
 					contact.addOrUpdateNumberOrAddress(noa);
 				}
@@ -484,10 +473,7 @@ public class ContactEditorFragment extends Fragment {
 			if (firstSipAddressIndex == -1) {
 				firstSipAddressIndex = controls.getChildCount();
 			}
-			numberOrAddress = numberOrAddress.replace("sip:", "");
-			if (numberOrAddress.contains("@")) {
-				numberOrAddress = numberOrAddress.split("@")[0];
-			}
+			numberOrAddress = LinphoneUtils.getDisplayableUsernameFromAddress(numberOrAddress);
 		}
 		if ((getResources().getBoolean(R.bool.hide_phone_numbers_in_editor) && !isSIP) || (getResources().getBoolean(R.bool.hide_sip_addresses_in_editor) && isSIP)) {
 			if (forceAddNumber)
diff --git a/src/org/linphone/LinphoneUtils.java b/src/org/linphone/LinphoneUtils.java
index f6e0edf3a..c11d4b669 100644
--- a/src/org/linphone/LinphoneUtils.java
+++ b/src/org/linphone/LinphoneUtils.java
@@ -478,5 +478,50 @@ public final class LinphoneUtils {
 			}
 		}
 	}
+	
+	public static String getDisplayableUsernameFromAddress(String sipAddress) {
+		String username = sipAddress;
+		LinphoneCore lc = LinphoneManager.getLcIfManagerNotDestroyedOrNull();
+		if (lc == null) return username;
+		
+		if (username.startsWith("sip:")) {
+			username = username.substring(4);
+		}
+
+		if (username.contains("@")) {
+			String domain = username.split("@")[1];
+			LinphoneProxyConfig lpc = lc.getDefaultProxyConfig();
+			if (lpc != null) {
+				if (domain.equals(lpc.getDomain())) {
+					return username.split("@")[0];
+				}
+			} else {
+				if (domain.equals(LinphoneManager.getInstance().getContext().getString(R.string.default_domain))) {
+					return username.split("@")[0];
+				}
+			}
+		}
+		return username;
+	}
+	
+	public static String getFullAddressFromUsername(String username) {
+		String sipAddress = username;
+		LinphoneCore lc = LinphoneManager.getLcIfManagerNotDestroyedOrNull();
+		if (lc == null) return sipAddress;
+		
+		if (!sipAddress.startsWith("sip:")) {
+			sipAddress = "sip:" + sipAddress;
+		}
+
+		if (!sipAddress.contains("@")) {
+			LinphoneProxyConfig lpc = lc.getDefaultProxyConfig();
+			if (lpc != null) {
+				sipAddress = sipAddress + "@" + lpc.getDomain();
+			} else {
+				sipAddress = sipAddress + "@" + LinphoneManager.getInstance().getContext().getString(R.string.default_domain);
+			}
+		}
+		return sipAddress;
+	}
 }
 
diff --git a/src/org/linphone/assistant/AssistantActivity.java b/src/org/linphone/assistant/AssistantActivity.java
index c2e767c42..ade2afc5d 100644
--- a/src/org/linphone/assistant/AssistantActivity.java
+++ b/src/org/linphone/assistant/AssistantActivity.java
@@ -20,6 +20,7 @@ Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA  02111-1307, USA.
 import org.linphone.LinphoneActivity;
 import org.linphone.LinphoneManager;
 import org.linphone.LinphonePreferences;
+import org.linphone.LinphoneUtils;
 import org.linphone.LinphonePreferences.AccountBuilder;
 import org.linphone.R;
 import org.linphone.StatusFragment;
@@ -366,16 +367,8 @@ private static AssistantActivity instance;
 		if (accountCreated)
 			return;
 
-		if(username.startsWith("sip:")) {
-			username = username.substring(4);
-		}
-
-		if (username.contains("@"))
-			username = username.split("@")[0];
-
-		if(domain.startsWith("sip:")) {
-			domain = domain.substring(4);
-		}
+		username = LinphoneUtils.getDisplayableUsernameFromAddress(username);
+		domain = LinphoneUtils.getDisplayableUsernameFromAddress(domain);
 
 		String identity = "sip:" + username + "@" + domain;
 		try {