I got a new phone and my plan doesn't have any data, but I wanted to leave data services on so that I can picture message. But I'm scared it's using the data to update apps and will cause me to incur extra costs. Is it?
Indeed, this will be what will happen if you activate data.
Unfortunately, I've searched the forum for a fix, and didn't seem to find the thread talking about it. Someone else will surely know how to set up your phone for it to work. The best solution will be that you have a data plan in order for it to work!