Australian phone roaming rates are among the most expensive in the developed world. Optus, Telstra and Vodafone's international roaming packages typically cost AUD $10–15 per day — that's AUD $140–210 for a two-week Japan or Bali trip just to use your existing number. An eSIM from Airalo costs AUD $8–25 for the same trip. The maths is straightforward.
This guide covers what an eSIM is, which providers work best for Australians, how to set one up, and the exact plans to buy for Australia's most popular destinations.
What Is an eSIM?
An eSIM (embedded SIM) is a digital SIM card built into your phone. Instead of buying a physical SIM card at the airport or using expensive roaming, you download a local data plan directly to your phone before you leave Australia. When you land at your destination, you switch to the eSIM and have instant local data — no airport queues, no SIM card fumbling, no roaming bills.
eSIMs have been standard in iPhones since iPhone XS (2018) and in most Android flagships since 2019. If your phone was bought in the last 4–5 years, it almost certainly supports eSIM.
Is Your Phone eSIM Compatible?
| Device | eSIM Compatible? |
|---|---|
| iPhone XS, XR and newer (all models) | Yes |
| iPhone SE (2nd gen 2020 and newer) | Yes |
| Samsung Galaxy S20 and newer | Yes |
| Google Pixel 3 and newer | Yes |
| Samsung Galaxy A series (2022+) | Most models yes |
| Older iPhones (X, 8, 7, 6) | No |
| Budget Android under AUD $300 | Often no — check specs |
Important: your phone must also be carrier-unlocked. Most Australian phones bought outright are unlocked. Phones bought on a Telstra, Optus or Vodafone plan are typically locked — contact your carrier to unlock before travelling.
Best eSIM Providers for Australians
Airalo — Best Overall
Airalo is the world's largest eSIM marketplace with coverage in 200+ countries. It's a marketplace model — you choose from multiple local carrier plans per destination, which means genuine competition on price. Browse Airalo plans for your destination.
- 200+ countries covered
- Marketplace model — compare plans from multiple operators
- Plans start from AUD $5–8 for 1GB/7 days
- 5G available in Japan, South Korea, USA and parts of Europe
- Easy app, instant activation
- 20 million+ users
Simify — Best Australian-Based Provider
Simify is an Australian-owned eSIM provider with strong Asia-Pacific coverage — particularly good for Japan, Bali, and Singapore where its local carrier partnerships deliver fast speeds. AUD pricing throughout, Australian customer support. Good choice if you want an Australian business behind your eSIM.
Holafly — Best for Heavy Data Users
Holafly offers unlimited data plans for many destinations — good for remote workers or heavy streamers. More expensive than Airalo for standard use but the unlimited option removes data anxiety on longer trips.
eSIM Prices for Australia's Top Destinations (AUD)
| Destination | Duration | Data | Airalo (approx AUD) | Recommended Plan |
|---|---|---|---|---|
| Japan | 30 days | 10GB | AUD $32–38 | 10GB/30 days — enough for maps, photos, messaging |
| Bali (Indonesia) | 30 days | 10GB | AUD $18–25 | 5GB sufficient for a 2-week holiday |
| Thailand | 30 days | 10GB | AUD $20–28 | 10GB for 2 weeks including maps and social |
| Europe (regional) | 30 days | 10GB | AUD $38–48 | Regional plan covers all EU countries in one |
| USA | 30 days | 10GB | AUD $22–30 | 10GB for 2 weeks with maps and navigation |
| Singapore | 30 days | 5GB | AUD $12–18 | 5GB more than enough for a stopover |
| South Korea | 30 days | 10GB | AUD $25–35 | Fast 5G network, great performance |
| Vietnam | 30 days | 10GB | AUD $18–25 | Good urban coverage, variable in rural areas |
eSIM vs Roaming vs Physical SIM — Which Is Best for Australians?
| eSIM | Australian Roaming | Local Physical SIM | |
|---|---|---|---|
| Cost (14 days Japan) | AUD $18–35 | AUD $140–210 | AUD $15–30 |
| Setup | Before departure, 5 min | Instant — already active | Airport on arrival, 20–40 min |
| Keep your number | Yes (dual SIM) | Yes | No (new number) |
| Calls and texts | Data only (most plans) | Yes, included | Usually included |
| Best for | Most travellers — best value | Short trips where convenience worth cost | Long stays, very cheap local plans |
How to Set Up an Airalo eSIM — Step by Step
- Check compatibility — your phone must be eSIM-compatible and carrier-unlocked
- Download the Airalo app — available on App Store and Google Play
- Create an account — email signup, takes 2 minutes
- Select your destination — browse plans for your country, choose data amount and duration
- Purchase — credit card, PayPal, or Apple/Google Pay. Instant delivery.
- Install the eSIM profile — follow the in-app instructions. Takes under 5 minutes on WiFi. Do this before you leave Australia.
- At your destination — go to Settings → Cellular → select your Airalo eSIM → switch on data. You're connected.
Pro tip: install the eSIM profile while on Australian WiFi, but don't activate data until you land. The validity countdown starts when you activate in-country, not when you install.
Tips for Australian Airalo Users
- Keep your Australian SIM active — run it in dual SIM mode. Your Telstra/Optus number stays active for calls and SMS (2FA, banking) while the eSIM handles data. You'll only pay roaming on the rare calls you make.
- Buy before you fly — eSIM plans require an internet connection to download. Install at home, not at the airport.
- Check device lock status — call your Australian carrier if unsure. Telstra and Optus both unlock free after 6 months.
- Top up in-app — if you run out of data, buy another plan directly in the Airalo app without needing WiFi for the purchase (though you need connection to activate).
Frequently Asked Questions
What is the best eSIM for Australians travelling to Japan?
Airalo is the best eSIM for Japan — it uses the SoftBank network with strong urban coverage and 5G in major cities. A 10GB/30-day plan costs approximately AUD $32–38. For rural Japan and off-the-beaten-path destinations, consider Simify which uses DOCOMO for slightly wider rural coverage.
Can I use an eSIM on my Australian phone?
Yes, if your phone supports eSIM (iPhone XS or newer, most Android flagships from 2019+) and is carrier-unlocked. Phones bought outright in Australia are typically unlocked. Phones on a carrier plan may need unlocking — contact Telstra, Optus or Vodafone directly.
Is Airalo safe for Australians?
Yes — Airalo is a legitimate, established eSIM marketplace used by over 20 million travellers worldwide. Founded in 2019, it's one of the most reviewed eSIM services on Trustpilot with 23,000+ reviews. Payment is processed securely and eSIM profiles are delivered instantly after purchase.
Can I keep receiving calls on my Australian number while using an eSIM?
Yes — most modern phones support dual SIM (two active SIMs simultaneously). Keep your Australian SIM in slot 1 for calls and SMS, and use the Airalo eSIM as the data connection. You'll only pay Australian roaming rates on calls you actually make and receive, not for data.