Finding Your Service / Phone Number
Your service number is your phone number and can be identified in the following ways.
Tip: Mobile Broadband service numbers have a similar format to regular mobile phone numbers.
If you've already registered and linked the service in My Account, you can see its service number by logging into your My Account profile.
This service is available for Mobile phone or Mobile Broadband, and does not apply to devices without SMS functionality (e.g. an ipad).
Use Optus SMS Menu
Go to your Messages app or your Optus Mobile Broadband inbox
Send a text containing the number 1 (one) to 9999 (It's a free text within Australia, so don't worry if you've no Prepaid credit or have an overdue bill)
Within a few moments you'll receive some details about your service including your service number.
On your bill
Your service number will appear on the first page of your bill, in the section 'This Bill'.