so i checked the account region is based on billing info
"Your account region was set when you first set up your Gamertag and can be checked by going to https://billing.microsoft.com and clicking on “Personal Information”."
im currently in singapore and created a whole new account and through personal information i confirmed its singapore. however when i purchase a game and entered the cd key, the game showed my region as US. is there any help i can get on this?