Originally Posted by 1001
GSM 1900 is for US
GSM 900 is for Asia
GSM 1800 is for ???
yea, but the different band are for different parts of the world. i have cingular and the phone works fine. my brother has t-mobile and it works the same. all you have to do is put your sim card in the phone and i works.
US also has GSM 850 which is hella strong.