Vodafone’s 3G network has been switched off for 9 months at this point, I don’t know if customers would still be getting messaging about it. Though there was a section in the article about issues with roaming for international visitors in January:
As a result of the Vodafone 3G switch-off in January, inbound Roaming customers have been receiving text messages advising they will no longer have access to voice, text or data and emergency calling whilst roaming in Australia.
Even customers with 5G iPhones have received such text messages.
Taleya@aussie.zone 4 months ago
They’re totally gonna get fucked by themselves .
The big telcos downstream to other companies that offer sim-only accounts (eg: i have a dodo acct, they resell optus). So they either kill the entire lucruative resell part of the business, or inevitably face court because telling someone “oh this phone doesn’t work because you no buy from optus” when a slew of other people are literally using the same self-provided model on their network will be exposed as the massively artificial pile of shit that it is.