Originally Posted by TheRinger
But again, you have a BES plan wich on the rim side says hey, i have a data plan so im allowed access.
BES BIS same diff, its a blackberry data plan. One for corporates and one for individuals.
Yes, the reason why it works is because the individual has a BIS/BES data plan on the account. Whether he/she is actually using the carrier for data is irrelevant (i.e. if he/she is using WiFi). The only important thing is that there is a BIS/BES data plan on the account for it to work... you don't have to be using the carrier's data at that point (you can use WiFi).
Without a BIS/BES data plan on the account, WiFi won't work for e-mail, instant messages, and other applications that go through RIM's servers.