Everything will be hacked, today it’s roaming text messages for the last few years

A quick Google search would say that Australia’s Optus, Telstra, and Vodafone are clients: Company That Routes Billions of Text Messages Quietly Says It Was Hacked

“whoever hacked Syniverse could have had access to metadata such as length and cost, caller and receiver’s numbers, the location of the parties in the call, as well as the content of SMS text messages.”