The Quick Version
Buy a local SIM card or eSIM from Vodafone, Optus, or Telstra at the airport when you land (10 minutes, AUD $20–50). You get a local number, fast data, and don't get gouged by international roaming. Done.
Don't use your home carrier's international roaming — it's 5–10x more expensive.
Australian Mobile Networks (The Big Three)
Telstra
- Coverage: Best coverage, especially regional/remote
- Speed: Good (LTE/4G)
- Price: Most expensive
- Best for: People going outside cities; those who prioritise reliability
Optus
- Coverage: Good in cities, weaker regionally
- Speed: Fastest urban speeds
- Price: Mid-range
- Best for: City-based travellers, speed enthusiasts
Vodafone
- Coverage: OK in cities, weaker outside
- Speed: Decent (LTE/4G)
- Price: Cheapest
- Best for: Budget travellers staying in Sydney/Melbourne/Brisbane
Reality: If you're staying in Sydney and surrounding areas, any of the three is fine. Telstra is worth the premium only if you're driving to remote areas (Outback, etc.).
How to Get a SIM Card
Option 1: Physical SIM at the Airport (Easiest)
- Arrive at Sydney Airport
- Go to the terminal's phone shop (usually near luggage claim or departures level)
- Tell them: "I want a prepaid SIM with data"
- Choose your plan (see below)
- They'll install it and test it
- You have a working phone in 10 minutes
Cost: AUD $25–50 depending on plan Pros: Instant, no online hassle Cons: Airport prices are slightly higher than city prices
Option 2: eSIM (If Your Phone Supports It)
If you have an iPhone 11+ or newer Android: 1. Before arriving, download the carrier's app (Optus, Telstra, Vodafone) 2. Buy an eSIM plan online 3. Scan a QR code on your phone, done 4. No physical card needed
Cost: AUD $20–40 (often cheaper than physical SIM) Pros: Instant digital activation, no physical card to lose Cons: Requires compatible phone
Option 3: Convenience Store (City)
Locations: 7-Eleven, Woolworths, Coles, Vodafone/Optus/Telstra stores in CBD
If you arrive without a SIM, you can grab one anywhere in the city. Same price as airport.
Data Plans (Prepaid)
Most visitors use prepaid plans — you pay upfront, use the data/calls, done. No contracts.
Weekly Plans (Best for Short Trips)
| Provider | Data | Cost | Expiry |
|---|---|---|---|
| Vodafone | 5GB | AUD $20 | 7 days |
| Optus | 5GB | AUD $25 | 7 days |
| Telstra | 4GB | AUD $30 | 7 days |
Good for: 1–2 week trips, casual data use (Maps, messages, light browsing)
Monthly Plans (Best Value)
| Provider | Data | Cost | Expiry |
|---|---|---|---|
| Vodafone | 20GB | AUD $40 | 30 days |
| Optus | 30GB | AUD $50 | 30 days |
| Telstra | 20GB | AUD $60 | 30 days |
Good for: 2–4 week trips, normal data use (streaming, constant Maps, social media)
Budget Option: Calls + Text Only
If you don't need data (using WiFi everywhere): - Vodafone: Unlimited calls/texts, AUD $10 for 7 days - Optus: Unlimited calls/texts, AUD $12 for 7 days
How Much Data Do You Actually Need?
- Light: Maps + messaging + occasional Instagram = 3–5GB/week
- Medium: Daily streaming, constant social media = 10–15GB/week
- Heavy: Video calls, Netflix, downloads = 20GB+/week
Most tourists: go for a monthly 20–30GB plan. You'll have plenty left over and pay less per GB than a weekly plan.
Getting a Local Number
When you buy a SIM, you automatically get an Australian phone number (starts with +61). It's unique to your SIM card.
Why you want it: - Uber, Airbnb, restaurants will text confirmations to this number - It looks local - It's included with your plan (calls/texts to other Aussie numbers are cheaper)
If people back home need to call you: - They can call your new Australian number (international call for them) - Or use WhatsApp/iMessage (works on any wifi/data)
WiFi Alternatives
If you really don't want a SIM: - Major hotels, cafés, shopping centres have free WiFi - Doable if you're never going far from the city - Not practical if you're roadtripping or going to regions
Just get a SIM. It's AUD $20–50 and solves everything.
Roaming Between Countries
If you're doing Australia + New Zealand + other countries, don't buy separate SIMs for each. Instead:
- Buy an eSIM plan with a provider that covers multiple countries (Vodafone, Optus, some international carriers)
- Or just get a local SIM each country (easy, takes 10 min)
If you're going from Australia to another country, your Australian SIM will stop working in that country (data rates become international roaming, which are expensive). Easiest: buy a new local SIM when you arrive.
Frequently Asked Questions
Q: Can I keep my home phone number? A: Not easily. You'll get an Australian number. If you need to receive calls to your home number, use WhatsApp/Viber on WiFi.
Q: What if I lose my SIM? A: Buy a new one (AUD $20–50). Your data plan might not transfer, so plan accordingly.
Q: Will my phone work? A: Yes, if it's unlocked (not locked to your home carrier). If locked, contact your carrier before leaving home to unlock it (usually free).
Q: How do I turn off roaming to avoid surprise charges? A: With a local SIM, you don't have roaming. Problem solved.
Q: What about calling back home? A: Use WhatsApp, Viber, or FaceTime (all free on WiFi). If you need traditional calls, Optus/Vodafone prepaid includes some international call credit.
Q: Is 5G available? A: Yes, in most cities. Most phones automatically use 4G/LTE though, which is plenty fast.
Bottom Line
Get a local prepaid SIM at the airport (10 minutes, AUD $20–50). You'll have fast data, local calls, and actually save money versus international roaming. It's the easiest decision you'll make.
