Activate or Replace a SIM Card: Postpaid

If your Optus Postpaid number is active and you need the SIM replaced, or you’d like to activate a new SIM, all the information you need is here.

Important: We are currently upgrading our billing system. If your account number starts with an 8, 9, or 10, click here.

If you’re experiencing SIM card, or activation issues, click here for help.

Activate a brand new service

First, back up your old SIM card. You can get help here. Your SIM should auto-activate within 4 hours of delivery. Periodically turn your device off and on until your SIM has activated. You will see Optus next to the coverage bars once the SIM is active.

If your service is not active after 4 hours, chat to us here.

Note. To activate a SIM and transfer your number from another company that uses the Optus network (e.g. Virgin, Amaysim, etc.), click here instead.

While you wait for your new SIM to be activated:

  • Insert your new SIM card into your device
  • Change your new SIM card PIN from the default (0000)
  • To manage your account for mobile devices including tablets, download the My Optus app
  • If you have a USB modem, connect it to your computer and install the connection software. For device help, click here

Note. We can only process ports Monday to Friday (8am - 8pm EST) and Saturday (10am - 6pm EST) (except on national public holidays). If you request a port outside of these hours, your service will remain active with your existing provider until the next porting day.

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Replace my SIM card

First, back up your old SIM card. You can get help here. Then login to your My Account to replace your SIM:

  1. Login to My Account

  2. Check or select the correct account from the Account Selector dropdown

  3. Click View Details

  4. Click Activate Your SIM and enter in the 13 or 19 digit SIM card number

  5. Then click Activate. Your SIM will be active within 15 minutes to 4 hours

While you wait for your new SIM to be activated:

  • Insert your new SIM card into your device
  • Change your new SIM card PIN from the default (0000)
  • Periodically turn your device off and on until your replacement SIM has activated
  • You will see Optus next to the coverage bars once the SIM is active
  • To manage your account for mobile devices including tablets, download the My Optus app
  • If you have a USB modem, connect it to your computer and install the connection software. For device help, click here

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