Can I use my dumb phone (no data) AT&T SIM card, on an AT&T iPhone?

My contract does not have a data plan, is there any way I can use the iPhone without having to add the data plan?

Added (1). The iPhone would be "off contract". (Ex.eBay, craigslist etc.)

They should allow you to use an iPhone with no data plan.
But I think they require you to get data when you get the phone.

Not sure. They have this trick where they like to bundle txting and data in one package.

NO way can you use an Iphone with no data plan. I mean you'll get SOCKED with overages on data. Probably thousands because the Iphone constantly pulls data from the internet all the time. They will make you get a data plan. That, plus the fact that the sim cards are a different size in the Iphone, it won't fit without cutting it and you have to be an expert to cut it without destroying it.