Terrible. They induce their customers to buy plans of T-mobile because they get highest margin from selling it. But they know almost nothing about plans they sell. You have to study before buying some services they sell because they will mislead you if you do not double check. Two of my friends bought SIM and prepaid plans, but both of them were completely taken in by clerk's wrong description. One of my friend requested a refund for the price difference of plans due to their mistake, but she couldn't receive any. read more