the following post is what I have used to fix my MMS issues
http://forum.ppcgeeks.com/showpost.p...postcount=5620 .
I did find however it sticks better if you use the mms for verizon fix by val.. But DOnt use the HTC kill by valk.. Unless you want just SMS. I can tell you if you have tried to tweak your mms already before installing Valkyrie's file it won't do it. I got error that said didnt have permission everytime.
Using Valkyrie's file makes it "stick" better, After trying diff settings, that sometimes switch back after soft reset, *@&^%#*(!% cm gUARDIAN) ( kILL IT IF YOU KNOW HOW. So if you have the time, simply swipe your system setup your MMS & have at it!