Current location using wi-fi on BlackBerry Storm 2 (9550)

Question

I want to get the current location using wi-fi on my Storm 2 9550. I implemented LocationProvider and it works fine on the simulator after sending lat long manually, but it doesn't work on the device.

GPS is already active on the device, but as far as I know, BlackBerry GPS cannot get a location without a network provider. There is no network provider on the device.