4 G on the unlocked international version?

[Robert Stoptaxinme Simpson]

I recently purchased the galaxy note 2 unlocked international and i have tried a few providers and i have the s3 as well both unlocked and my S3 gets 4g with my at&t sim but my note will not is there some way around this because i can only use the internet when im at home on wifi with my note WTF? this kind of sucks :-\