You'll need to edit the apns-conf.xml to reflect Virgin Mobile's values 311 490
For anyone who wants to try:
- use a root capable file manager, and copy the /system/etc/apns-conf.xml file to your PC (it's too large to edit on the phone)
- open it with a good text editor (notepad may work, but I don't ever recommend notepad).
- search for Virgin Mobile US, and change the mmc to 311 and mnc to 490.
- copy it back to your phone,
- clear cache in the MMS app,
- reboot.
^jerrys MMS fix maby a OS dev could add that in for us? idk how to