Stright Talk Nokia Lumia 920 MMS Fix

Was enjoying my Stright Talk service until receiving several MMS messages.. 

that showed 

"Get media content now (1KB)" and then upon selecting the message would get "Media content not available" 

here is the fix: 

1. go to "Settings / cellular / edit mms apn" and make sure you got this

MMS APN: att.mvno
User name: leave blank
Password: leave blank
WAP gateway (URL): 66.209.11.33
WAP gateway port: 80
MMSC: http://mmsc.cingular.com

Btw, 

here are the Interned settings for "edit internet apn"

Internet APN: att.mvno

User Name: leave blank
Password: leave blank

Proxy server (URL): proxy.mvno.tracfone.com

Proxy port: 80

video from Mark  (http://thenokiablog.com)