I am off to HK shortly with a friends IDD Talk Stored Value card. While in HK, it looks like I can call to China and the US for local airtime only. What about roaming? What if I take that SIM with me to China and Singapore? I can't seem to figure out what the local and US Outbound would cost as well as inbound?

Also, what about data? Does the prepaid sim offer a data service and if so, how much is it? I just want to download my email and maybe browse the web a little.

Thanks.