diff --git a/asterisk_click2dial/asterisk_click2dial.py b/asterisk_click2dial/asterisk_click2dial.py
index 2852e13..f162d52 100644
--- a/asterisk_click2dial/asterisk_click2dial.py
+++ b/asterisk_click2dial/asterisk_click2dial.py
@@ -514,12 +514,14 @@ class res_partner_address(osv.osv):
 
     def get_partner_from_phone_number(self, cr, uid, number, context=None):
         # We check that "number" is really a number
+        _logger.debug(u"Call get_name_from_phone_number with number = %s" % number)
         if not isinstance(number, str):
+            _logger.warning(u"Number should be a 'str' but it is a '%s'" % type(number))
             return False
+            _logger.warning(u"Number should only contain digits.")
         if not number.isdigit():
             return False
 
-        _logger.debug(u"Call get_name_from_phone_number with number = %s" % number)
         # We try to match a phone or mobile number with the same end
         pg_seach_number = '%' + number
         res_ids = self.search(cr, uid, ['|', ('phone_e164', 'ilike', pg_seach_number), ('mobile_e164', 'ilike', pg_seach_number)], context=context)