This was a huge failure for the phone and energy company. There is no reason that kind of use should be allowed in the first place. Here in the US, a lot of GSM

This was a huge failure for the phone and energy company. There is no reason that kind of use should be allowed in the first place. Here in the US, a lot of GSM based alarm systems have SIM cards in them, but they are access controlled to prevent such theft and abuse. I'm not trying to excuse the woman's behavior, but Telstra needs to get their act together to prevent similar crimes in the future.