Have you got a MAC address filter on your router? If you you need to add your Omnia's mac address to the allow list. It's on the system screen in settings.
nah i dont have a mac address filter on my router. its too fiddly when there are so many wireless devices in the house. just to add i also get a device.exe error everytime ive reset, flashed my phone. something to do with jaguargspx.dll