I am in the same boat, on the Storm 1 there was a place to choose call forwarding in the phone options. However I have not been able to find it on the storm 2. You can do it this way if you would like:
To Activate:
1. Press *72.
2. Enter the phone number where you want calls to be forwarded. (e.g. *72-908-123-4567).
3. Press SEND and wait for confirmation. You should hear a confirmation tone or a message.
4. Press END.
To Deactivate:
1. Press *73.
2. Press SEND and wait for confirmation. You should hear a confirmation tone or a message.
3. Press END.