Originally Posted by graffitimonkie
Do you know if T-Mobile will charge for this service even though you're on your own wifi network at home?
And is there anything that you can't use such as the google maps or jivetalk and email applications unless you have an internet account with T-Mobile?
No, you won't be charged for the use of your own WiFi network.
I have no idea which apps you can use via WiFi exclusively.
There's a FAQ article at blackberryfaq.com which details what you can/can't do without a BlackBerry Data Plan.