Same as the rest, fake call. Interesting it called again! and left a second voicemail, and in the voicemail repeated the return number to call back. I do not know why Sprint,Verizon is not blocking these at the phone system level.
Amusing note, the voice on the voicemail says 'a lawsuit against (pause) you', mine just said 'you' I wonder if the pause was looking up custom names if they have them.