Smartphone and Internet connection

Hi,

I want to know, if i use a smartphone to connect to internet, whats the charge like? For GPRS and HSPA.

If i don't have any data transfer or download, do I still pay for anything? Means if I just connect only.

Thanks for any input.

if i am correct

if you are under singtel, u won't be charged if ur in their website

same case for starhub.

but for other website/msn.. u have to pay..

charges i am not sure