I want to get a device for my mum that enables her to call me with one press of a button. I ordered one on ebay - GSM SIM SOS emergency dialler - but after inserting a new telstra sim and following the instructions, it didnt work. Contacted telstra for support with the sim, and discovered that devices which require GSM Sim cards only work on 2g network which has been shut down in australia.

So now i am on a mission to make sure all devices being sold on ebay.com.au that require a GSM Sim are flagged with "device not supported in Australia" or similar.

How would i go about that please?

Thanks in advance.