Folks,
Not just when you play oversea but if you dont have a data plan, its not worth for you to browse internet on 3G. Its bloody expensive. i.e. 70MB cost abt sg300 and a data plan for 1GB can be as cheap as sg12.
Bottom line, if you don't want to pay-and-pay on data, please do not browse. in fact, you can call up singtel directly to switch off 3G data browsing. It really save money. I was spending abt sg136 last month and it dropped to sg95 this month.