Great post! :cool:As far as I understand it will still work even without SIM inserted (for GSM models), because a BlackBerry data plan is tied to the PIN, which in turn is hardcoded into the device itself. Therefore even with WiFi the device will try to authenticate with the RIM servers and once it has done this, all BlackBerry services will work purely over WiFi. This will still need a data plan as authentication without one is impossible.