Got a call from this unknown (an very unlikely) 'mobile' number today, and, just like a whole lot of other apparently nuisance calls from unknown number arseholes lately, when I ring the number back (with my number sending hidden) I just got the old "...advises that the number you have called is disconnected). It will either be that or, "...the number you have dialled is currently not receiving calls", or "the number you have dialled currently has incoming call restrictions".
How do these scumbags manage to keep doing this, and also manage to have and endless supply of 'disconnected' phone numbers to use? And checking/screening the numbers (about a dozen or so now) on Googke, and at places like here, NOBODY has reported anything about any of them.