The seller iphone 3g explain to me that the phone 3g unlock work with external sim slot which is 2 sim together if i using t-mobile sim stick with that sim . He said unlock but that look like still lock , if unlock 100 % i can using all sim dont have to using that sim chip . Also he said if i travel out side usa go to different country shop to purchase that sim slot and insert in the sim i want to used in , so still 2 sim .
is anyway to unlock iphone 3g 100 % using 1 sim