[VivekAshwin]

Hey guys I need help understanding more on BIS. I just recently got a Torch 9810 and I am thinking of getting BIS.

As far as I know, apparently I need BIS to get access to the internet even if I have wifi? Can anybody clarify that?

Furthermore, if I get BIS, how sure am I if I use internet on wifi it would use wifi rather than BIS?

Please somebody help me out man. Im confused

[Dubdub]

You need BIS for all BB related services, such as Internet, email, BBM, App World, etc.. What do I need a Data Plan for? - BlackBerryFAQ

Many carriers also require you to have BIS before allowing WiFi access since you can't get WiFi without the proper service books.

In most cases, data will go via WiFI when connected rather than via the carrier's data network. Some apps may require a cell data connection so I cannot say that all data will go via WiFi when connected.