Getting a SIM Card and Mobile Plan in Australia: A UK Guide

26 August 2026

UK mobile pricing has gotten steadily more competitive in recent years, so the gap with Australia is smaller than it used to be, but Australia still runs on a genuinely different network structure - three carriers instead of the UK's four, and coverage that has to stretch across a much bigger, emptier country.

The three main networks

Most budget providers (MVNOs) in Australia run on one of these three underlying networks, so coverage from a smaller brand depends entirely on which one it uses.

Telstra

The largest network, covering roughly 99% of the population and by far the widest geographic reach. It's the most expensive of the three, but the rural and regional coverage gap versus Optus and Vodafone/TPG is real and much bigger than the equivalent gap between EE, O2, Vodafone and Three back home - Australia's distances are on another scale entirely.

Optus

Strong metropolitan and regional-centre coverage, typically cheaper than Telstra. A solid choice if you're settling in Sydney, Melbourne, Brisbane or another major city and don't need remote coverage.

TPG / Vodafone

The third network, now under TPG Telecom (the local Vodafone brand merged with TPG some years ago - not the same corporate entity as UK Vodafone). Solid in cities, weaker regionally, often competitive on price.

Boost Mobile (Telstra network)

AUD $25-45

15GB-60GB per 28 days, widest coverage of the MVNOs

Amaysim (Optus network)

AUD $25-40

15GB-40GB, strong metro value

Felix (Vodafone/TPG network)

AUD $35

unlimited data, throttled after roughly 25GB

Average prepaid plan

~AUD $39/month

cheaper options around AUD $25 for roughly 25GB are widely available

Cross-checked against multiple current Australian mobile plan comparison sources (Finder, ShopBack, SimFinder), as at 26 Aug 2026.

Prepaid vs postpaid

Prepaid, sold as a rolling monthly "pay as you go" plan rather than the UK's typical bundled contract, is the obvious starting point: no lock-in, no Australian credit history required. Postpaid plans, often bundled with a handset over 12-24 months, generally require a credit check, and your UK credit history won't transfer automatically - expect to build an Australian credit footprint before postpaid options open up properly.

Where to buy on arrival

SIMs are available at airport kiosks (convenient but usually the priciest option), supermarkets (Coles and Woolworths both sell prepaid SIMs near the checkout), telco retail stores in any shopping centre, and online through the MVNOs above, with delivery in a day or two.

Calling home to the UK

Check your plan's international call inclusions before you sign up - some Australian prepaid plans include UK minutes as standard, others don't. WhatsApp, FaceTime and Google Meet over Wi-Fi cover everything else for free. Keep your UK number alive on a cheap plan or a roaming-only SIM for the first month if you rely on it for two-factor authentication on UK bank accounts or government services (HMRC, DWP).

Moving from the UK to Australia?

Our free relocation checklist covers your SIM, bank account, tax residency and everything else to sort in your first two weeks.

Get the free checklist

The bottom line

Grab a prepaid SIM at the airport or a supermarket on arrival, then switch to a better-value MVNO once you know where you're settling. Telstra if you need genuine regional coverage, Optus, TPG or an MVNO on either network if you're staying in a capital city. Pricing sits close enough to what you're used to in the UK that it shouldn't be a source of bill shock.