I thought I'd ask a customer before I asked customer service...
Hi, I only just started a new AT&T account this spring. My first month I had it as the 2 GB Data Plan for Smartphones, and then I didn't use much of the allotted data, so I changed it to the 200 MB Data Plan for Smartphones for my second month.
But now I've used more data than I expected...and I think for my next month I'll want to go back up to the 2 GB plan after all.
What I noticed is that I cannot currently change it when I go into "change features." That's probably because I literally just signed up for the 200 MB Plan and they don't want to lose their possible overage fee if I go over the 200 MB or whatever. (Which would be only $5 more than if I was paying for the 2 GB plan, but still. Ow.)
What I'm wondering is when will I be able to change it back up to the 2 GB Plan? Later in the month? Later in the week, after my bill for this month is processed? I have this paranoid thought I won't be able to change it at all. I don't know, I know that's foolish.