Caller claiming to be from Telstra. Just happened that day before I had reason to sort out an issue wth Telstra.Asked about coloured lights on router then asked me to log in and start entering commands. At that stage I stopped as it was clear this was a scam as Telstra do not interfere with microsoft programs.Indian accent. Just hang up on him..

Caller claimed to be Telstra
Quite convincing until he asked me to log onto my bank!
He had Teamviewer access to my computer.
Anglo name with a very strong Indian accent. Will report to Testra!