As you may know, AT&T and Cingular have joined to form "The New AT&T". If you currently have a Cingular SIM card or you have a SIM card issued by "The New AT&T" then the following phones should be compatible. We no longer list phones for use with the old AT&T SIM cards. If you need a phone to operate with your older AT&T SIM card please contact customer service and they will be happy to assist you.