for those on sprint what i did to get my MMS working is i installed apristel arcsoft mms sprint cab and i send and receive with no problems. i dont use any disable cabs. that is the only cab i use for my MMS fix. if it gives you an can not install error then soft reset and then install it again right after u fully reboot.
http://forum.ppcgeeks.com/attachment...5&d=1257882972
i got it from NRGZ's attachments link