What is eSIM?

eSIM stands for embedded SIM and is a digital SIM card that is integrated into your device, such as a smartphone or smartwatch. Just like a physical, traditional SIM card, an eSIM contains the information that connects your number to your provider and activates your specific mobile plan.

Info! There is generally no cost to choose an eSIM over a physical SIM card. Most Aussie providers also allow you to switch from a physical SIM to an eSIM for free via their app or website.

Unlike a physical SIM, you don’t have to wait for the mail to arrive. Since the chip is already built into your device, you usually only need to scan a QR code or follow a few steps in a provider’s app to get connected instantly. While the “Big Three” (Telstra, Optus, and Vodafone) all support eSIM, many smaller providers (MVNOs) now offer it as well.

International eSIM and travel

One of the biggest advantages of eSIM technology is how easy it makes international travel. Instead of paying expensive roaming charges to your Australian provider, you can download a travel eSIM before you even land at your destination. This allows you to access local data rates across Europe, Asia, or the US while keeping your Australian number active for important calls.

Pros and cons of eSIM

  • Instant activation without waiting for mail delivery
  • Better for the environment with less plastic waste
  • Higher security as the eSIM cannot be physically removed

  • Harder to transfer between devices
  • Limited compatibility with older/budget devices

Is eSIM available for both SIM Only and prepaid plans?

Yes, eSIMs are available for both SIM Only(postpaid) and prepaid plans. Historically, eSIM was mostly reserved for expensive postpaid contracts, but today, popular Aussie providers also offer prepaid eSIM options. However, it is always worth checking the specific plan details, as some smaller providers might still only offer physical SIMs for certain “long-expiry” or promotional deals.

How to get an eSIM

  1. Ensure your device supports eSIM: Most modern smartphones (iPhone XS/XR or newer, Samsung Galaxy S20 or newer, and Google Pixel 3 or newer) support eSIM. You can check your “Network & Internet” settings to see if an “Add eSIM” option exists.
  2. Choose the right eSIM provider: Ensure the provider has good coverage where you live and work. In Australia, this means choosing between the Telstra, Optus, or Vodafone networks.
  3. Compare plans: Use our comparison tables to filter for eSIM-compatible plans. Look for features like data banking or international calls depending on your needs.
  4. Select eSIM at checkout: When signing up online, you will usually be asked if you want a physical SIM or an eSIM. Choose eSIM for instant delivery.
  5. Scan and connect: Once you’ve purchased your plan, the provider will email you a QR code or provide a “one-tap” installation link in their mobile app.

Which is the cheapest eSIM?

CMobile C Red 0.5 GB is the cheapest pay monthly eSIM plan right now (checked on 20/10/26). The cost is $10.90/month when you sign a 0-month contract.

Get the deal at CMobile

ALDI Mobile 365 Days is the cheapest prepaid eSIM right now (checked on 20/10/26). Top up from $2.00.

Get the deal at ALDI Mobile

How to activate an eSIM on your mobile

The activation process is quick, but the steps vary slightly depending on your phone’s operating system. Ensure you are connected to Wi-Fi before starting the process.

Activate eSIM on iPhone

  1. Open Settings.
  2. Tap Mobile Data (or Cellular).
  3. Tap Add eSIM (or Add Data Plan).
  4. Select Use QR Code and scan the code provided by your telco.
  5. Follow the prompts to label your new line (e.g., “Personal” or “Business”) and tap Done.

Activate eSIM on Samsung Galaxy

  1. Go to Settings > Connections.
  2. Tap SIM manager.
  3. Select Add eSIM.
  4. Scan the QR code from your provider or follow the in-app instructions.
  5. Confirm the addition and restart your device if prompted.

Can I transfer eSIM to a new phone?

Unlike a physical SIM card, you cannot simply “pop out” an eSIM and put it into a new device. The transfer process depends on your phone’s operating system and your Australian telco.

Methods for transferring your eSIM

  • iPhone to iPhone (eSIM Quick Transfer): Apple has a built-in feature that allows you to transfer your eSIM during the initial setup of your new iPhone. However, your provider must support this (most major ones like Telstra, Optus, and Vodafone do).
  • Android and other transfers: For most other transfers, the standard process in Australia is to perform a “SIM Swap” via your provider’s app (such as the My Telstra or My Optus app).
  • Requesting a new QR code: If your provider doesn’t support automatic transfers, you will usually need to log in to your account on your new device and request a replacement eSIM. This will generate a new QR code for you to scan.

Please note! Once the eSIM is activated on your new phone, it will automatically deactivate on your old one.

How eSIM works for smartwatches

In Australia, using an eSIM on a smartwatch (like an Apple Watch Cellular or Samsung Galaxy Watch) typically requires a feature called Number Share (Telstra/Optus) or OneNumber (Vodafone).

This service “mirrors” your primary mobile number onto your watch. This allows you to go for a run or head to the beach without your phone, while still being able to make calls and stream music using your shared data allowance.

To use eSIM on a smartwatch, you need

  • A cellular-compatible smartwatch.
  • A postpaid mobile plan with a provider that supports number sharing (Note: Most prepaid plans currently do not support Apple Watch/Galaxy Watch cellular features).
  • To pay a small monthly add-on fee (usually around $5–$10 per month).

Frequently asked questions about eSIM

Does it cost anything to switch from a physical SIM to an eSIM?

In most cases, no. Most Australian telcos allow you to perform a “SIM swap” to an eSIM via their self-service apps at no extra cost.
Can I use the same QR code multiple times?

Usually, no. For security reasons, most eSIM QR codes are “single-use”. If you delete your eSIM profile or get a new phone, you will typically need to request a new activation code or “replacement eSIM” from your provider.
How does Dual SIM work with eSIM?

Most modern phones allow you to have two lines active at the same time (e.g., one physical SIM and one eSIM). However, most devices use Dual SIM Dual Standby (DSDS) technology. This means both numbers can receive calls and texts while in standby, but if you are actively on a call on one line, the other line will usually go to voicemail or appear unreachable. Only a few high-end Dual SIM Dual Active (DSDA) devices allow you to use both lines simultaneously for calls.
How long does it take for an eSIM to activate?

Activation is usually very fast, often taking between 15 minutes and 4 hours. In some cases, it can be almost instantaneous.
Can I store more than one eSIM profile on my device?

Yes, most modern smartphones allow you to store multiple eSIM profiles (usually up to 5–10) at once. This is handy if you have a local Australian plan but also want to keep several travel eSIMs stored for your trips. While you can store many profiles, remember that you can typically only have one or two eSIMs “active” and connected to a network at the same time.