As long as it has the 3G bands that your carrier has then you have no problem's at all, I believe that the two you spoke of both use the same 3G bands as AT&T which is the 850/1900 bands. So I would make sure that it had those, as for any other set up the phone should get all it needs from the sim card. I have never had any problem's at all with setup on my unlocked phones. If you do need the APN setting all you need do is Google them and you should not have any problem's at all. All I ever do is put the sim in the phone and it is good to go.