Call 321 from your Optus mobile in Australia and follow the setup prompts. From another phone or overseas, Optus lists +61 411 000 321 for retrieving messages.
Set up and check your mailbox
Call from the correct SIM
On a dual-SIM phone, choose the Optus line before dialling 321.
Finish the tutorial
Follow the prompts for your PIN, name and greeting. Optus’s 321 guide says to complete the tutorial in full.
Make a test call
Use another phone, let the Optus phone ring unanswered and leave a short message. Then call 321 to check it.
Source: Optus: cannot listen to voice messages.
For a greeting, keep the request simple: name, reason for calling and a callback number. Follow the mailbox prompts to change it later. We have not verified a current consumer menu-key sequence, so follow what your own mailbox says rather than an old list of button presses.
Give yourself longer to answer
For 30 seconds before voicemail, dial **61*321**30# and press Call. Optus supports five-second increments up to 30 seconds. This changes the no-answer diversion timer; it does not change the ringtone sound or volume.
Source: Optus: change the ring time before diversion.
Turn voicemail off
Message Optus in My Optus or My Account and ask to remove carrier voicemail from the relevant number. Ask the agent to confirm what callers will hear afterwards. This avoids using a blanket diversion-cancellation code that might also remove a forwarding arrangement you meant to keep.
Source: Optus: contact customer service.
Before travelling
Save +61 411 000 321 and make sure you know your mailbox PIN before leaving. Optus’s older 321 guide also describes entering your full mobile number and PIN when prompted. It is a business guide, so we use it for the basic mailbox process, not as evidence of today’s consumer charges.
Ask Optus how voicemail retrieval and diversions are charged on your particular roaming arrangement. Do not assume that a domestic inclusion makes the same call free overseas.
If voicemail still fails
321 does not connect
- Check
- Which SIM placed the call and whether you are overseas.
- Next
- Use the appropriate access number above, then contact Optus if access still fails.
The caller cannot leave a message
- Check
- Whether you completed setup and whether unanswered calls divert.
- Next
- Ask support to check voicemail provisioning and the no-answer diversion on the service.
The PIN is rejected
- Check
- Whether you are using a voicemail PIN rather than a phone-unlock code.
- Next
- Request a reset through Optus; avoid repeated guesses.
Sources and review notes
Checked 10 September 2026 against the sources below. This is documentation-based guidance; we did not access a customer account or test these instructions on a handset. No claim is made that 1509 or voicemail-to-text is available on every current Prepaid or postpaid plan.
Official sources
Optus: cannot listen to voice messages321 setup and +61 411 000 321 for remote and overseas retrieval.devicehelp.optus.com.au- Optus: 321 Voicemail user guide2017 business guide, pages 1–2: PIN and tutorial only; not authority for current consumer prices or feature availability.www.optus.com.au
- Optus: change the ring time before diversionVoicemail ring timer **61*321**XX#, five-second increments to 30 seconds.www.optus.com.au
- Optus: contact customer serviceMy Optus/My Account messaging and customer service 133 937.www.optus.com.au
Michel Elijah covers technology, streaming and online security for Tech X Telco. He writes practical how-to guides on everything from email troubleshooting to spotting the latest scams doing the rounds in Australia, with a focus on clear steps anyone can follow.
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