this "fix" i found was always making sure the connection was always named "Alltel Wireless/AlltelWireless" and then use
Server Name: Alltel MMSC
Gateway: mms.alltel.com
Port Number:8080
Server Address:
http://mms.alltel.com/servlets/mms
Connection via: Alltel Wireless
i run Arcsoft 5.0.82.79 just fine sending and receiving pics with no problems.