Hi @Perth360 , we recommend having a read of these community articles, which may help with your concern:
Troubleshooting Problems with TPG Home Phone Calls
Troubleshooting No Dial Tone - TPG Home Phone/Voice Service
If the issue persists, please send us a private message with your TPG customer ID, username and complete address so we can pull up the account and further assist you.
To send a PM, please refer to this link: How do I private message (PM) in the community
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