diff --git a/src/org/sflphone/model/CallContact.java b/src/org/sflphone/model/CallContact.java
index fd70395..7463219 100644
--- a/src/org/sflphone/model/CallContact.java
+++ b/src/org/sflphone/model/CallContact.java
@@ -323,4 +323,12 @@
         contact_photo = new WeakReference<Bitmap>(externalBMP);
     }
 
+    /**
+     * A contact is Unknown when his name == his phone number
+     * @return true when Name == Number
+     */
+    public boolean isUnknown() {
+       return mDisplayName.contentEquals(phones.get(0).getNumber());
+    }
+
 }