While Telstra has announced that it will delay its shutdown until August 31, the Government hasn't ruled out stepping in to ensure that no one is left behind. In the meantime, Telstra has set up a service for customers to check whether their mobile phone will need to be replaced. Telstra and Optus customers can check by sending the text message 3 to phone number 3498. If you are with another telco, you will have to contact your service provider directly. In the midst of a cost-of-living crisis though, not everyone can afford to buy a new mobile.