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Our database contains cell coverage information for Optus, Telstra, and Vodafone.

Results show indoor and outdoor coverage for voice calls, 3G data, 4G (LTE) data, and 5G data for every postcode in Australia for each carrier.

What is mobile coverage and signal checking?

Before you sign up with a new carrier, you need to be sure that you can get good reception - both good coverage and a reliable signal - where you live and work. If you can't, you might not be able to make calls, send messages, or use apps when you need to.

Our Signal Checker shows the coverage and signal strength for your postcode and helps you see which carrier will give you the best service. We check all the main carriers at once, saving you the time and effort of having to visit them all individually.

Who provides mobile coverage in Australia?

There are three main carriers that provide mobile coverage across Australia. In order of size, they are:

• Telstra
• Optus
• Vodafone

These companies build and maintain their own mobile network infrastructure, including the phone towers that you can see all around your towns and cities. The more of these towers you have in your area, the better the signal will be from the carrier that owns them.

What other carriers are there?

As well as the main carriers, there are two other categories of carrier that you can choose from.

• Regional carriers: some carriers are only available in certain regions.
• MVNOs: Mobile Virtual Network Operators don't maintain their own networks, they rent and resell coverage from one of the three main carriers. There's over a hundred of them, and some are also regional. Big names include amaysim, TPG, ALDImobile, and Vocus Group.

MVNOs will often offer prepaid deals. This means you don't have to sign a contract, but pay in advance for an allowance of data and calls instead. These often work out a little more expensive, but the convenience might be worth it, especially if you don't use your phone that much.

What types of mobile coverage are there?

Carriers provide several different cellular services. Coverage for each can differ from one region to the next, and the one that you use can also be dictated by what you're doing on your phone and what type of phone you've got.

• 5G: the latest type of data connection - it's truly rapid, with speeds over 1Gbps. It's also still very new, so coverage is patchy at best. It has been rolled out in parts of large cities around the country, but you'll have to wait several years before it becomes common nationwide. The new iPhone 12 supports 5G.
• 4G (LTE): the previous generation is used for data, as well as voice calls (depending on your phone and carrier). It has over 90% coverage around Australia, and all modern smartphones support it. You can get speeds over 150Mbps.
• 3G: now used for data and voice where an LTE connection is not available. You won't use it much, but if you do you could get speeds of 7.2Mbps.
• Voice: the most basic type of coverage is voice (or 2G), used for calls and text messaging over SMS (iMessage and similar apps use the 4G or 5G network).

Will my phone work with every carrier?

As a general rule, your phone will work with every carrier even if you buy it outright, separate from your contract. 

There can be some technical issues, though. Different carriers' networks run on different frequencies, and your phone needs to support these. Most modern phones do support them all. 

For voice calls, the situation also used to be complicated. Carriers used one of two types of cellular tech - GSM or CDMA - and you needed a phone that was compatible with whichever service your carrier used. However, this only applies to 2G and 3G connections. 

LTE (for 4G) is a different technology again, so unless you're still using a very old device you don't need to worry about it.

What affects my mobile signal?

The main thing that affects your mobile signal is your carrier's coverage. If you're literally stood next to one of their cell towers you'll have a perfect signal. But if you're a long way from a tower, that signal may come and go. This can affect your data download speeds, or result in dropped calls.

There are other factors, too:

• Your environment: the signal from a cell tower can be blocked by large physical objects. Your signal can be worse indoors than outdoors, in the basement, or if you're surrounded by skyscrapers or mountains.
• The weather: bad weather, including very heavy rain, snow, or thunderstorms, can temporarily knock out your phone signal.
• Crowds: if you're in a crowded place, with lots of people trying to connect to the same cell tower at the same time, you're likely to find the speeds a lot slower - and you might not be able to connect at all.
• Your phone: every phone gets its signal through a built-in antenna. Some of these are better than others.
• Travelling: if you're on a train, or in a moving car, you might find your cellphone signal is inconsistent. This is because you're constantly moving out of the range of one cell tower, and into range of another, and your phone has to keep switching connections between them.

How can I improve my mobile signal?

Sometimes you can't get a phone signal right when you need it most. Don't worry, there are some things you can try.

• Move upstairs: many of the kinds of things that can block a phone signal are nearer the ground, so just going upstairs, or finding higher ground outdoors can help. 
• Go to a window: signal strength is often better outdoors than indoors, so stand near a window - and open the window if you can.
• Go outside: if standing near a window doesn't help, going outside should do.
• Turn your phone off and on: when a phone disconnects from the network it can sometimes struggle to reconnect again. Switch your phone into airplane mode quickly, or turn it off and turn it on again, to force the device to connect to the network once more.
• Try Wi-Fi calling: if you're having problems with voice calls, consider switching to a Wi-Fi calling app. There are loads available for both iPhone and Android - Skype lets you call standard phone numbers, while you can use WhatsApp to call your regular contacts.
• Use a signal booster: are you able to get a signal outside your home, but not inside? You could consider getting a signal booster, which uses an external antenna and amplifies the signal throughout your home. Some carriers even sell their own signal boosters.
• Switch to a better carrier: if you're having constant problems with poor reception, use our signal checker to see if there's a carrier with better coverage in your area.

How do I check my mobile coverage?

So what's the best way to discover which carrier has the best mobile coverage where you live? Simply scroll back up to the top of the page, enter your postal code into the box, and we'll do the rest. 

We'll show you whether you can get voice, 3G, 4G, and 5G coverage from Australia's three biggest carriers.

Alternatively, you can check mobile coverage stats for all states and territories in Australia

• New South Wales
• gate io app
• Victoria
• Australian Capital Territory
• Queensland
• South Australia
• Tasmania
• Western Australia