Originally Posted by MidnightDraven
you NEED a blackberry data plan and then it will use wi-fi.
Blackberry Data Plan > Gchat [Enabled through the BIS] > Wi-Fi (Gchat can then travel through the Wi-Fi connection)
Gchat is Enabled/Useable only with a Blackberry Data Plan, once enabled, you can use your Wi-Fi connection to boost (or use without an network connection) your applications.
A little more clarity, though I don't see how I can make it much more clear than Midnight did, but i tried.