I have a Gizmo SIP account configured but it seems that the only way to call a PTSN contact via SIP is to open the phone app, go to the dial pad, change the call type to SIP, and enter the number. Obviously, memorizing a phone number every time is not feasible, so how can one easily place a SIP call to an existing contact's phone number? A work around could be performed by changing the default call type from cellular to SIP but it doesn't seem like that is even possible. Am I missing something, or is this just not yet programmed into the phone app?