These codes are used for land lines or mobiles that use Telstra as a provider.
Turn on Call Forward: **code*(phone number to forward calls to, including area code)*10#
Turn off call Forward: ##code**10#
Check if forwarding is on: *#code#
Where: “code” is:
21 for “All calls”
61 for “No answer”
62 for “Unreachable”, ie “out of coverage”
67 for “Busy”
Specifically for “no answer”, you can set the duration your phone rings before it diverts using the the following:
**61*(phone number to forward calls to, including area code)**(number of seconds)#
This was compiled from the following Telstra pages (though I will point out that none of the pages mention the “unreachable” diversion – this oversight should be corrected):
https://go.telstra.com.au/helpandsupport/-/turn-ca
https://go.telstra.com.au/helpandsupport/-/turn-ca
https://go.telstra.com.au/helpandsupport/-/check-i
source: https://crowdsupport.telstra.com.au/t5/General-Mobiles/Call-Forwarding-Codes-Mobile-Network/m-p/150164#M2521
