When making a phone call, I will use one of two resources. This is very simple and to the point. The first option is to use my cellular line. This will likely be the way I will call, especially when calling US, Canada, or the UK (all are included). The second option will be to use a special SIP account that I have plugged into my [Cellular] phone. When making calls from this resource, I have made it so that my [Cellular] Number will show.