diff --git a/voip/java/android/net/sip/SipProfile.java b/voip/java/android/net/sip/SipProfile.java
index f8fd2b7b61f19..c7e18dfbae65b 100644
--- a/voip/java/android/net/sip/SipProfile.java
+++ b/voip/java/android/net/sip/SipProfile.java
@@ -49,6 +49,7 @@ public class SipProfile implements Parcelable, Serializable, Cloneable {
     private String mDomain;
     private String mProtocol = UDP;
     private String mProfileName;
+    private String mAuthUserName;
     private int mPort = DEFAULT_PORT;
     private boolean mSendKeepAlive = false;
     private boolean mAutoRegistration = true;
@@ -146,6 +147,18 @@ public class SipProfile implements Parcelable, Serializable, Cloneable {
                     : "sip:" + uriString);
         }
 
+        /**
+         * Sets the username used for authentication.
+         *
+         * @param name auth. name of the profile
+         * @return this builder object
+         * @hide // TODO: remove when we make it public
+         */
+        public Builder setAuthUserName(String name) {
+            mProfile.mAuthUserName = name;
+            return this;
+        }
+
         /**
          * Sets the name of the profile. This name is given by user.
          *
@@ -300,6 +313,7 @@ public class SipProfile implements Parcelable, Serializable, Cloneable {
         mAutoRegistration = (in.readInt() == 0) ? false : true;
         mCallingUid = in.readInt();
         mPort = in.readInt();
+        mAuthUserName = in.readString();
     }
 
     @Override
@@ -314,6 +328,7 @@ public class SipProfile implements Parcelable, Serializable, Cloneable {
         out.writeInt(mAutoRegistration ? 1 : 0);
         out.writeInt(mCallingUid);
         out.writeInt(mPort);
+        out.writeString(mAuthUserName);
     }
 
     @Override
@@ -374,6 +389,17 @@ public class SipProfile implements Parcelable, Serializable, Cloneable {
         return getUri().getUser();
     }
 
+    /**
+     * Gets the username for authentication. If it is null, then the username
+     * should be used in authentication instead.
+     *
+     * @return the auth. username
+     * @hide // TODO: remove when we make it public
+     */
+    public String getAuthUserName() {
+        return mAuthUserName;
+    }
+
     /**
      * Gets the password.
      *
diff --git a/voip/java/com/android/server/sip/SipSessionGroup.java b/voip/java/com/android/server/sip/SipSessionGroup.java
index 3275317775740..aa616a9e0fa12 100644
--- a/voip/java/com/android/server/sip/SipSessionGroup.java
+++ b/voip/java/com/android/server/sip/SipSessionGroup.java
@@ -895,7 +895,9 @@ class SipSessionGroup implements SipListener {
                         challengedTransaction, String realm) {
                     return new UserCredentials() {
                         public String getUserName() {
-                            return mLocalProfile.getUserName();
+                            String username = mLocalProfile.getAuthUserName();
+                            return (!TextUtils.isEmpty(username) ? username :
+                                    mLocalProfile.getUserName());
                         }
 
                         public String getPassword() {