Hi frostbyte0! Thanks for using the forum.
We don't have any other settings we can give you. One thing to keep in mind is the phone will need to be able to connect to the internet on T-Mobile's network in order for the MMS to have the best chance of going through. The tricky thing is even with all the correct settings entered, T-Mobile is unable to guarantee the services will work on Non T-Mobile phones.
ABSOLUTELY, POSITIVELY can NOT get a Samsung Rugby II to MMS on the TMobile network, even after setting up different APN profiles for text and internet, it won't do it. You can only use it as a phone and send regular (non-picture) texts. There is NO OPTION to change settings to IPv4 and IPv6, which is necessary for MMS use.Unless TMobile configures their system to accept whatever protocol the Rugby II is using to send MMS, it can't be done.