M1 had just announced that it would allow its mobile subscribers to use their existing mobile data bundle for data roaming overseas. This move would allow users data usage in a handful of countries: Indonesia, Japan, Malaysia, United States, Saudi Arabia and Sri Lanka.
At the moment, M1 customers who exceed their data bundles pay excess data usage rates of S$10.70 per GB, capped at S$188.32 per month.
Singtel and StarHub currently have no such program. However, you could still use data roaming packagesat additional charges. StarHub users pay a flat fee of $10 per 100MB daily, or sign up to monthly plans that offer bundled data on top of their current local mobile plans.
With Singtel the monthly add-on value-added service option with prices ranging from S$5 to S$388 per month.