Ran across this at another site… sounds like a modified SSA scam. Unfortunately, FireRTC refuses to call it and gives me a SIP error every time. Maybe someone else can give it a whirl and see what it is. Here is text from the robocall:
Hi this call is from crime investigation department(?) of Homeland Security of Homeland Security. The reason of this call is to inform you that there is an arrest warrant issued on your name in regards to some criminal activity. So I need you to call us back whenever direct line number 443-396-7093. I repeat 8-443-396-7093. Now if I don't hear a call from you we will have to issue an arrest warrant under your name and get you arrested. So give us a call back as soon as you get this message. Thank you.
Someone give 'em a ring and see what's up!