before when cingular wasnt AT&T i got a cingular phone and sim card. my cell phone doesn't work anymore so i want to go buy a new one but now cingular is AT&T and i dont know if my old cingular SIM card will work in the AT&T phones.

Yes, your SIM card will be fine.

Go to a Cingular/AT&T store to be sure.

It might..the first time I had AT&T then Cingular bought them...and now that AT&t has bought them back..they assured us that they wouldn't make us switch phones again..so its a good chance that it will work.