here are ALL the settings on an Alltel LG 245 under MMS
CB Support: Off
Subscribed: On
Resolution: 640 x 480
Retry Number: 3
MMSC Server:
http://mms.alltel.com/servlets/mms
User Agent Profile:
http://www.alltel.net/mms/ax245_MMS_V01.xml
MMSC Post URL: /servlets/mms
Upload Address: mml.alltel.com
MMSC Post CGI: ?message-id=
Autorization: Commercial
Model ID: ax245
let me know if you need anything else.