Index: phone.module
===================================================================
RCS file: /cvs/drupal-contrib/contributions/modules/phone/phone.module,v
retrieving revision 1.23
diff -u -p -w -r1.23 phone.module
--- phone.module	8 Mar 2009 00:04:26 -0000	1.23
+++ phone.module	2 Aug 2009 17:15:14 -0000
@@ -529,6 +529,9 @@ function phone_widget(&$form, &$form_sta
  * to remove empty, non-required values before saving them.
  */
 function phone_content_is_empty($item, $field) {
+  if (empty($item['value'])) {
+    return TRUE;
+  }
   return FALSE;
 }