The person who rang claimed to be from Telstra Technical. They had info on the number and account. Gave me a 1800 number to call back [there were too many digits in the 1800 number]. I called the 03 number back and an answering machine advised that the number was busy but I could stay on the line to wait however there COULD be costs and call charges. I hung up immediately. Guess one should beware of this caller.