A question about a Nokia 3595 At&t on the Go phone

Can anyone help?.... If I purchased a At&t "On The Go Phone" which comes with a prepaid cellular service plan and a Nokia 3595 would I be able to unlock it as normal for when I am traveling to central america it is a Gsm/Gprs 1900mhz sim phone just as I did my Nokia 8390 which know thanks to Nokiafree.org has been unlocked for good and works overseas as well as central america or would there be some sort of an unclock code impossible to break placed on it from At&t..would love any input on this has anyone tried....thanks a Million guys

if it is only 1900 MHz you will be able to use it only in america, but it can be unlocked normally with codes, just like any other dct4 model.