How to Activate Your Telstra SIM Card at

So you just got a shiny new Telstra SIM card in the mail. Excellent choice! As Australia’s largest telecommunications company, Telstra provides quality mobile and internet services across the country.

But before you can start making calls, sending texts, and getting 5G data, you need to activate your Telstra service. This straightforward process registers your SIM card with the Telstra network so it can be used.

This article will walk you through how to easily activate both prepaid and postpaid Telstra SIM cards. Let’s get started!

Pre-Activation Checklist

Before activating your Telstra SIM online, make sure you have the following:

  • Your SIM’s serial number (found on the back of the SIM card packet)
  • Valid ID like a driver’s license
  • Your contact details like phone number and email
  • Stable internet connection
  • Web-enabled phone, tablet, or computer to access the activation site

Got everything? Great! Head over to the Telstra activation site and let’s get your service up and running.

Activate Telstra Pre-Paid SIM Card at

Prepaid plans offer flexibility if you don’t want to commit to a long-term contract. Follow these simple steps to activate Telstra Prepaid:

  1. Go to
  2. Click “Activate my Pre-Paid Service”
  3. Enter your 13-digit SIM serial number
    • You can find this on the back of your SIM packet
  4. Click “Check Serial Number”
  5. Choose whether to:
    • Get a new Telstra number
    • Transfer your number from current provider
  6. Select whether SIM is for:
    • Mobile phone
    • Data-only device
  7. Enter your ID details when prompted
  8. Provide your contact details
  9. Select a prepaid plan
  10. Recharge your account
  11. Confirm details and click “Activate”

You’ll get a confirmation email/text when the activation is complete. Give it 4+ hours for the service to fully activate.

For phone number transfers, wait up to 48 hours. Once active, insert the Telstra SIM into your phone and enjoy! Activate your Post-Paid Service

Postpaid plans require a month-to-month contract but allow you to pay service fees after using Telstra’s network each billing cycle.

Activating a postpaid SIM is easy:

  1. Go to
  2. Click “Activate my post-paid service”
  3. Insert Telstra SIM into phone
  4. Enter your mobile number
  5. Click “Activate”
  6. Follow on-screen prompts to finish

And that’s it! Your postpaid service will activate shortly.

💡Pro Tip: Business customers should contact Telstra support for activation help.

FAQs: Activating Your Telstra SIM Card

Here are answers to some frequently asked questions about getting started with Telstra mobile service:

How do I activate my Telstra Prepaid SIM card online?

  • Go to and sign in with your Telstra ID.
  • Follow the instructions to activate your prepaid service.

Who can I contact for Telstra customer support?

You can reach Telstra customer service by:

Activating your Telstra service is the first step to connecting with friends and family on a fast and reliable network. This guide covered everything you need to get started with prepaid SIMs, postpaid SIMs and answered some common activation questions.

Now pick up the phone and make that first call – your Telstra service is ready to rock!