The ipad 2 3G version is not carrier locked in (like the iphones) to any particular carrier, even though in the US and some other countries they appear to be linked with certain phone companies' 3G price plans. The difference lies in the technology used for conveying 3G. AT&T uses GSM and Verizon CDMA. Therefore,
if you have GSM in your country then I suggest you buy an Ipad 2 with 3G which supports this from the US like the AT&T one. It should work fine. Hope this helps.