My wife and I both have a StraightTalk Galaxy Centura phone, and we are both unable to send text messages with images attached (I assume that is MMS). Receiving seems to be a problem, as well. I've tried it using both the stock Messaging app, as well as GoSMS. Anyone else have this issue, and is there a fix? I've seen some forums that talk about changing APN settings, but I don't know what those should be for this phone.