The 3-G network in the country is in its final months of operation.
Although the end of 3-G has been marked for years, the latest industry figures show that there are more than half a million [530,000] Australians still using devices incompatible with 4-G and 5-G networks.
Telecoms companies are racing to reach mobile phone users ahead of the 3G stoppage
They have contacted affected customers and users to take action.
Users may not realize their phone is configured this way until 3-G is turned off.

Telstra will compensate 42,000 customers Source: AAP
Telstra will shut down its 3G network on August 31. Optus will shut down their network from September, while TPG Telecom/Vodafone starts shutting down in January.