iOS 7 & APN settings question

Hey guys

I'm currently on a JB 4S running Straight Talk (AT&T sim), so that allowed me to change two things:
- The network from "HOME" to "ST"
- The MMS settings without using the 'Tmobile sim swap method'. (APN settings are hidden for AT&T sim)

The typical 'profiles' on unlockit.co.nz do not work for MMS, just data... at least on iOS6.

Has anyone tried this on iOS7? Do you know if the APN settings are available on an AT&T sim... or are they still hidden? Anyone using ST who has tried it?

Thanks!