"John Williams" (fake name - he had a thick indian accent) called at 9am today from "Singtel" and launched in to saying that there's a problem with my singel wifi and to check my router. No security check or anything....

It was a Malaysian phone number so i knew it could be a scam when i picked up.
I asked him to tell me my name and address. Obviously he couldn't...
....because i don't have WiFi with singte!!.

I told him that, that i knew it was a scam and was going to report the number today and he went silent.

I can see there are other reports of this same guy in this forum.
He's clearly worked in the industry before as he knew the right jargon to use. His english was good.

Called me from (+60 16 4011686)