Australia - Optus is battling to find the cause of a fault in its network, which allows customers to eavesdrop on others' phone calls.
The issue was originally thought to be limited to the Optus pre-paid mobile service, but smh.com.au readers have subsequently described the issue occurring in Optus' landline network as well.
It has customers fearing their privacy has been compromised.
Users reported having to physically demonstrate the issue to Optus before they committed to looking further into it. (more)