Telstra mobile phones were blacked out 28 April. It started at 10am after a power failure and a cut in a cable. But according to newspaper reports, “The company only became aware of the problem about 1.30pm but fixed it by 2pm. “. It only affected mobiles registered with the particular exchange in Sydney. Bit of a worry when it takes them 3 hours to realise part of their mobile phone network wasn’t working.