[taxilian]

In order to make Internet Calling work, you have to set up your sip settings using the latest sipconfigtool. Then, you need to set up your dialplan by editing ipdialplan.xml in your \Windows\ directory. When that is all done, if it can register to the sip provider (usually if your data connection is active) it will, and then your dialer will display the name of your sip provider instead of your cell provider. If you have your dialplan set up right, you can set it up to know which numbers to dial using which service, or have it default to try one first and then the other.

However:

Internet calling doesn't work very well. The audio quality is so-so on the other end, and the volume on the mogul is so low that it is totally unusable (actually, maybe with nueSound this could be fixed... I doubt it, but I'll have to try that sometime soon). The biggest problem that I ran into, however, is that for some reason when the ip phone was connected, the cell phone signal strength dropped by at least 6db, which essentially means unless I was standing outside with a perfect view of the tower I usually had no service.

Your mileage may vary. If you're still interested, I can dig out my ipdialplan.xml that I made to work with a gizmo project login.