I've just heard of someone being scammed. A phone call from a "Live Technician" with a Las Vegas number and a Canadian billing address, scammed this elderly woman for several hundred dollars and wiped much of her laptop, iPad, and iPhone clean. The caller "knew" which devices she owned before she told him and she unwittingly gave him access to her devices. He was claiming that she needed to buy his company's malware and that her computer was loaded with troubles. He wiped out whole programs she'd paid for, and supposedly installed their malware. Of course, all of her information and identity is now stolen.
Please be aware of these scams! She now has a big expensive mess on her hands. It could all have been averted if she'd hung up on the call. Don't give anyone info or access to your devices.