Just got a call from this number - guy claimed to be from Telstra and that I had a problem with my internet connection - Telstra don't ring about possible problems. Asked him to prove he was from Telstra, he just forlornly said he was from Telstra. When I told him that Telstra don't call you about problems, they always wait for customer to call them, he made no comment. I hung up. Getting a number of calls like this lately.