Australia’s mobile coverage maps have been redrawn. Under a new ACMA national standard in force since the start of July, every provider must map coverage the same honest way — and the headline consequence is that Telstra’s famous coverage footprint has shrunk substantially on paper, even though the network itself hasn’t changed.
What Happened
The new standard requires all mobile providers to publish 4G and 5G maps using four defined categories — Good, Moderate, Basic and No coverage — with a common signal-strength floor: anything below -115 dBm must now be labelled “no coverage”, as reported by GadgetGuy. Telstra lobbied for a more generous -122 dBm threshold and was the only major carrier to object; Optus, TPG Telecom and the ACCC all backed the stricter line. Maps must now be refreshed at least every three months, with penalties for providers that overstate.
Early reports estimated Telstra would need to remove up to a million square kilometres of claimed coverage. Telstra’s own explanation of the change puts its new predicted footprint at just over 2.14 million square kilometres — still, by its own description, more than 900,000 square kilometres larger than any other network, with Optus and Vodafone each mapping around 1.2 million.
Did Telstra’s Coverage Actually Shrink?
No — and Telstra is at pains to say so: “There’s no change to the real-world coverage you experience.” The company says around 1.5 million customers a month successfully use its network in areas the new maps now mark as “no coverage”. What’s changed is the honesty of the map, not the reach of the towers.
Context matters here, though. TPG Telecom alleged last year that Telstra had overstated its coverage by up to 40 per cent over 15 years, claiming its engineers couldn’t complete calls at more than 20 locations marked as full coverage — allegations that helped drive the push for a common standard. As consumer group ACCAN’s CEO Carol Bennett put it, coverage claims “don’t always match reality”, and consumers need to know what they can actually rely on.
What It Means For You
If you pay the Telstra premium specifically for coverage, this is your prompt to check what you’re actually buying. The spots that matter — your home, your work, the drive between them, the holiday-house black spot — may now show as Basic or Moderate rather than blanket “covered”. That’s not Telstra getting worse; it’s the map finally telling you what your phone already knew.
The bigger win: for the first time, all three networks’ maps use identical definitions, so comparing Telstra vs Optus vs Vodafone coverage at your address is finally an apples-to-apples exercise. For many metro and large-regional-town users, the cheaper networks now demonstrably cover everything they need — our guide to which providers use the Telstra network explains how the budget brands map to the big three.
What To Do About It
Check all three carriers’ new maps for the handful of places you actually spend time — ten minutes, once. If a cheaper network covers your life, a prepaid SIM costs almost nothing to trial for a month before you commit. Compare current plans across every network below:
If the map check convinces you to move, keeping your number is straightforward — here’s how to switch mobile providers in Australia — and our cheapest SIM-only plans roundup shows live pricing on all three networks.
