diff --git a/src/sipcentric/__init__.py b/src/sipcentric/__init__.py
index 3251f03..25c4c9e 100644
--- a/src/sipcentric/__init__.py
+++ b/src/sipcentric/__init__.py
@@ -159,7 +159,10 @@ class APIObject(object):
             raise ValueError(
                 "%s ID %d already created" % (self.__class__.__name__, self.id)
             )
-        self.data.update(**kwargs)
+        if self._data:
+            self._data.update(**kwargs)
+        else:
+            self._data = kwargs
         if not self._data:
             raise ValueError("No data associated with record.")
         return self._create(parent=parent,data=self._data)
@@ -277,7 +280,10 @@ class Customer(APIObject):
     def create(self, parent=None, **kwargs):
         if parent:
             raise ValueError("Customer cannot have a parent")
-        self.data.update(**kwargs)
+        if self._data:
+            self._data.update(**kwargs)
+        else:
+            self._data = kwargs
         for k in ("accountType", "company", "firstName", "lastName", "email", "address1", "city", "postcode", "telephone"):
             if k not in self._data:
                 raise ValueError('missing mandatory field "%s"' % k)
@@ -330,38 +336,47 @@ class MailboxEndpoint(Endpoint):
 
 class PhoneNumber(APIObject):
     URLPART = "phonenumbers"
+    TYPE = "did"
 
 
 class Call(APIObject):
     URLPART = "calls"
+    TYPE = "call"
 
 
 class CallBundle(APIObject):
     URLPART = "callbundles"
+    TYPE = "customerbundle"
 
 
 class Recording(APIObject):
     URLPART = "recordings"
+    TYPE = "recording"
 
 
 class PhoneBook(APIObject):
     URLPART = "phonebook"
+    TYPE = "phonebookentry"
 
 
 class TimeInterval(APIObject):
     URLPART = "timeintervals"
+    TYPE = "XXX"
 
 
 class Sound(APIObject):
     URLPART = "sounds"
+    TYPE = "music"
 
 
 class OutgoingCallerId(APIObject):
     URLPART = "outgoingcallerids"
+    TYPE = "outgoingcallerid"
 
 
 class CreditStatus(APIObject):
     URLPART = "creditstatus"
+    TYPE = "XXX"
 
 
 class LinkedUser(APIObject):
@@ -369,7 +384,10 @@ class LinkedUser(APIObject):
     TYPE = "linkeduser"
 
     def create(self, parent, **kwargs):
-        self.data.update(**kwargs)
+        if self._data:
+            self._data.update(**kwargs)
+        else:
+            self._data = kwargs
         for k in ("activateUrl", "email", "recordingAccess", "owner", "enabled"):
             if k not in self._data:
                 raise ValueError('missing mandatory field "%s"' % k)
@@ -378,6 +396,7 @@ class LinkedUser(APIObject):
 
 class Sms(APIObject):
     URLPART = "sms"
+    TYPE = "smsmessage"
 
 #     def post(self, to=None, _from=None, body=None):
 #         data = {"type": "smsmessage", "to": to, "from": _from, "body": body}