I've already submitted a ticket, but I just thought I'd post this here in case someone else has a similar issue or can help.

When I call my friend's cell phone, I hear a couple rings, then a "this number is no longer in service or is disconnected" recording. She does not hear any rings on her end. If I call her cell from a landline/POTS, the call goes through fine. I can call several other phone numbers with VOIPo and there are no issues, so it's just this particular number that's an issue (though I suspect there are other numbers out there that would have the same issue).