How to Get MMS picture text to work on iphone 4 for Straight talk

I'm am wanting to use them for my wife who does not need to have the quickest network ect she is a stay at home mother but she does send me a lot of pictures of my kids through out the day and I want to keep that. Now I just talked with someone at straight talk and they said it will work so I guess ill see when I'm finished talking to them when I get home.

So I called straight talk and they sent me a file to download to the phone and it gave me data usage but no mms like they said! Shocker I guess, even though they told me it would work the only way mms works is if you are sending to an iphone and then it works because you are using imessage i guess. They told me if I didnt bring my own phone and bought there iphone it would work just fine. Just seems odd to me that I cant update the settings in the phone to make it happen.