diff --git a/res/values-FR/strings.xml b/res/values-FR/strings.xml
index 028455e22..d200cd85c 100644
--- a/res/values-FR/strings.xml
+++ b/res/values-FR/strings.xml
@@ -76,7 +76,8 @@
 	
 	<string name="pref_network_title">Réseau</string>
 	<string name="pref_transport">Transport</string>
-	<string name="pref_transport_use_standard_ports">Utiliser les ports standards</string>
+	<string name="pref_transport_use_random_ports">Utiliser des ports aléatoires</string>
+	<string name="pref_sip_port_title">Port SIP à utiliser si port aléatoire désactivé</string>
 	<string name="at_least_a_protocol">Au moins un est requis</string>
 
 
diff --git a/res/values/non_localizable_defaults.xml b/res/values/non_localizable_defaults.xml
index b290635e8..8dfbe645a 100644
--- a/res/values/non_localizable_defaults.xml
+++ b/res/values/non_localizable_defaults.xml
@@ -36,7 +36,8 @@
     <bool name="pref_wifi_only_default">false</bool>
 	<string name="default_stun">stun.linphone.org</string>
     <bool name="pref_ice_enabled_default">false</bool>
-    <bool name="pref_transport_use_standard_ports_default">false</bool>
+    <bool name="pref_transport_use_random_ports_default">true</bool>
+    <string name="pref_sip_port_default">5060</string>
     <string name="pref_transport_default">@string/pref_transport_udp_key</string>
 	<string name="default_audio_port">7078</string>
 	<string name="default_video_port">9078</string>
diff --git a/res/values/non_localizable_strings.xml b/res/values/non_localizable_strings.xml
index fb98ee49b..78ed6a0bc 100644
--- a/res/values/non_localizable_strings.xml
+++ b/res/values/non_localizable_strings.xml
@@ -40,7 +40,8 @@
 	<string name="pref_transport_udp_key">pref_transport_udp_key</string>
 	<string name="pref_transport_tcp_key">pref_transport_tcp_key</string>
 	<string name="pref_transport_tls_key">pref_transport_tls_key</string>
-	<string name="pref_transport_use_standard_ports_key">pref_transport_use_standard_ports_key</string>
+	<string name="pref_transport_use_random_ports_key">pref_transport_use_random_ports_key</string>
+	<string name="pref_sip_port_key">pref_sip_port_key</string>
 
     <string name="pref_echo_canceller_calibration_key">pref_echo_canceller_calibration_key</string>
     <string name="pref_prefix_key">pref_prefix_key</string>
diff --git a/res/values/strings.xml b/res/values/strings.xml
index 8f4c8c82c..9570c4305 100644
--- a/res/values/strings.xml
+++ b/res/values/strings.xml
@@ -95,7 +95,8 @@
 	<string name="pref_transport_udp">UDP</string>
 	<string name="pref_transport_tcp">TCP</string>
 	<string name="pref_transport_tls">TLS</string>
-	<string name="pref_transport_use_standard_ports">Use standard ports</string>
+	<string name="pref_transport_use_random_ports">Use random ports</string>
+	<string name="pref_sip_port_title">SIP port to use</string>
 	<string name="at_least_a_protocol">At least one item is required</string>
 
     <string name="first_launch_ok">Registration successful</string>
diff --git a/res/xml/preferences.xml b/res/xml/preferences.xml
index 786874196..7c3f3c40d 100644
--- a/res/xml/preferences.xml
+++ b/res/xml/preferences.xml
@@ -233,9 +233,15 @@
 				android:defaultValue="@bool/pref_ice_enabled_default"/>
 			
 			<CheckBoxPreference 
-			    android:key="@string/pref_transport_use_standard_ports_key"
-				android:title="@string/pref_transport_use_standard_ports"
-				android:defaultValue="@bool/pref_transport_use_standard_ports_default"/>
+			    android:key="@string/pref_transport_use_random_ports_key"
+				android:title="@string/pref_transport_use_random_ports"
+				android:defaultValue="@bool/pref_transport_use_random_ports_default"/>
+			
+			<EditTextPreference 
+			    android:key="@string/pref_sip_port_key"
+			    android:title="@string/pref_sip_port_title"
+			    android:defaultValue="@string/pref_sip_port_default"
+				android:numeric="integer"/>
 			
 			<EditTextPreference 
 			    android:key="@string/pref_audio_port_key"
diff --git a/src/org/linphone/LinphoneManager.java b/src/org/linphone/LinphoneManager.java
index 7f84bc631..677fcdbab 100644
--- a/src/org/linphone/LinphoneManager.java
+++ b/src/org/linphone/LinphoneManager.java
@@ -788,11 +788,11 @@ public final class LinphoneManager implements LinphoneCoreListener {
 	
 	private void setSignalingTransportsFromConfiguration(Transports t) {
 		Transports ports = new Transports(t);
-		boolean useStandardPort = getPrefBoolean(R.string.pref_transport_use_standard_ports_key, mR.getBoolean(R.bool.pref_transport_use_standard_ports_default));
-		int lPreviousPort = ports.tcp +ports.udp +ports.tls; // assume only one port is active 
-		if (lPreviousPort>0xFFFF) {
-			Log.e("Bad port number ["+lPreviousPort+"] using random instead");
+		boolean useRandomPort = getPrefBoolean(R.string.pref_transport_use_random_ports_key, mR.getBoolean(R.bool.pref_transport_use_random_ports_default));
+		int lPreviousPort = tryToParseIntValue(getPrefString(R.string.pref_sip_port_key, getString(R.string.pref_sip_port_default)), 5060);
+		if (lPreviousPort>0xFFFF || useRandomPort) {
 			lPreviousPort=(0xDFFF & (int)Math.random())+1024;
+			Log.w("Using random port " + lPreviousPort);
 		}
 		
 		String transport = getPrefString(R.string.pref_transport_key, getString(R.string.pref_transport_udp_key));
@@ -800,29 +800,17 @@ public final class LinphoneManager implements LinphoneCoreListener {
 		{
 			ports.udp = 0;
 			ports.tls = 0;
-			if (useStandardPort) {
-				ports.tcp = 5060;
-			} else if (ports.tcp==0){
-				ports.tcp=lPreviousPort;
-			}
+			ports.tcp = lPreviousPort;
 		} else if (transport.equals(getString(R.string.pref_transport_udp_key)))
 		{
 			ports.tcp = 0;
 			ports.tls = 0;
-			if (useStandardPort) {
-				ports.udp = 5060;
-			} else if (ports.udp==0) {
-				ports.udp = lPreviousPort;
-			}
+			ports.udp = lPreviousPort;
 		} else if (transport.equals(getString(R.string.pref_transport_tls_key)))
 		{
 			ports.udp = 0;
 			ports.tcp = 0;
-			if (useStandardPort) {
-				ports.tls = 5061;
-			} else if (ports.tls==0) {
-				ports.tls=lPreviousPort;
-			}
+			ports.tls = lPreviousPort;
 		}
 
 		mLc.setSignalingTransportPorts(ports);
diff --git a/src/org/linphone/PreferencesFragment.java b/src/org/linphone/PreferencesFragment.java
index 1fc95be91..0177ea044 100644
--- a/src/org/linphone/PreferencesFragment.java
+++ b/src/org/linphone/PreferencesFragment.java
@@ -56,6 +56,7 @@ import android.preference.CheckBoxPreference;
 import android.preference.EditTextPreference;
 import android.preference.ListPreference;
 import android.preference.Preference;
+import android.preference.Preference.OnPreferenceChangeListener;
 import android.preference.Preference.OnPreferenceClickListener;
 import android.preference.PreferenceCategory;
 
@@ -204,6 +205,18 @@ public class PreferencesFragment extends PreferencesListFragment implements EcCa
 		} else {
 			findPreference(getString(R.string.menu_about_key)).setLayoutResource(R.layout.hidden);
 		}
+		
+		final CheckBoxPreference useRandomPort = (CheckBoxPreference) findPreference(R.string.pref_transport_use_random_ports_key);
+		final Preference sipPort = findPreference(R.string.pref_sip_port_key);
+		sipPort.setEnabled(!useRandomPort.isChecked());
+		useRandomPort.setOnPreferenceChangeListener(new OnPreferenceChangeListener() {
+			@Override
+			public boolean onPreferenceChange(Preference preference, Object newValue) {
+				boolean isChecked = (Boolean) newValue;
+				sipPort.setEnabled(!isChecked);
+				return true;
+			}
+		});
 	}
 	
 	private void createAddAccountButton() {