THANK YOU Brian Quick1, i spent countless hours with the complete idiots at straight talk for over a week trying to fix the mms on my new ZTE phone and none of them ( i spoke with over 8 employees ) ever knew what they were doing. i even spoke to someone from tracfone's corporate office and he knew less than the people in the P.I. (even though they all still knew more than me!)
so in desperation i found this website and started reading. in less than 5 minutes i found this thread, plugged in your APN settings and I now have my MMS working. amazing the information to be found here, i hope that i never need to contact tech support again at ST.
my phone is a ZTE Z998 at&t phone that I brought over to ST with a new micro sim card. your settings did the trick.
thanks again