[Biker1]

Go to Settings; Enable WiFi But if you are not getting any data service from your Diamond carrier, I am not sure if the Diamond will capture your home subscriber's hotspot signal.I would think that you would be able to though as long as WiFi is enabled on your Diamond. Others may be able to chime in on this issue.
Edit: If your home hotspot has security enabled, you will have to disable it or enter the passcode into your Diamond but you probably already know that.