Australia has three mobile operators that run their own networks: Telstra, Optus and Vodafone. Vodafone is now a brand operated by TPG Telecom, and most budget brands rent capacity from one of these three. Telstra leads clearly on subscribers and coverage area, and all three offer 4G and 5G in the cities. The differences appear once you leave the cities. This article compares Australia's operators using their 2026 results, official information and Ookla speed data, and shows how to check which network your travel eSIM connects to.
If you want your Australian connection ready before you fly, you can pick a data size that suits your stay from the Coral eSIM Australia plan. The supported network is shown on the product page.
Australia mobile operators: three networks, and budget brands ride on them
Here are Australia's main mobile operators. Figures come from each company's 2026 results; the reporting date and counting method differ by company.
| Operator | Company | Mobile services | As of |
|---|---|---|---|
| Telstra | Telstra Group | 26.0 million retail services (plus 2.9 million wholesale users) | FY to June 2026 |
| Optus | Optus (owned by Singtel of Singapore) | 10.722 million (prepaid, postpaid and connected devices) | 31 March 2026 |
| Vodafone | TPG Telecom | 5.806 million | 30 June 2026 |
Singtel's results put Optus's mobile market share at 31.1%. Among budget brands, Boost officially states that it uses the Telstra prepaid network, and amaysim appears in Optus's results as an Optus brand. Whatever the brand name, the signal actually comes from Telstra, Optus or Vodafone.
The 3G switch-off also happened at different times: Vodafone in January 2024, and Telstra and Optus from 28 October 2024. How the shutdown led to phones being blocked is covered in Wi-Fi and mobile coverage in Australia.
Coverage of Australia's mobile operators: Telstra is far ahead on area
Most of Australia's land is dry interior, and people are concentrated in coastal cities. That is why "percentage of population covered" and "square kilometres covered" tell very different stories.
- Telstra: in May 2025 it stated coverage of 3 million km² and 99.7% of the population. Its 2026 results say its network covers 900,000 km² more than any other
- Vodafone (TPG Telecom): its website gives around 1.2 million km², and its August 2026 results cite 99% population coverage
- Optus: we could not find a recent, dated population or area figure on its official site
Population coverage is high for all three, so central Sydney, Melbourne, Brisbane or Cairns rarely cause trouble. By area, though, the gap between Telstra and the other two is clear. On outback drives, in national parks or when touring small towns, the operator decides which stretches have signal. Operators' coverage maps follow a new industry standard from 2026; how to read them is explained in Wi-Fi and mobile coverage in Australia.
Optus and TPG regional sharing changed rural coverage from 2025
Australia is moving toward two operators sharing regional sites. On 5 September 2024 the competition regulator, the ACCC, said it would not oppose the regional network sharing deal between Optus and TPG Telecom. The key points:
- TPG customers can use Optus sites in regional areas
- Optus can use TPG's 700 MHz, 1800 MHz, 3.6 GHz and 3.7 GHz spectrum in those areas
- About 17% of Australia's population lives in the covered areas
- The initial term is 11 years, with an option to extend by 5 years
TPG's results say this regional expansion started in January 2025. In December 2022 the ACCC had refused a similar sharing deal between Telstra and TPG. So in regional Australia there are now two networks side by side: Telstra's own, and the one Optus and TPG share. For travellers, it means an eSIM on Optus and an eSIM on Vodafone may use the same Optus sites outside the cities.
Australian operators run 5G mainly on 3.5 GHz (n78)
The 5G spectrum each operator uses, as stated in official announcements:
| Operator | Main 5G spectrum | 5G bands |
|---|---|---|
| Telstra | Mainly 3.6 GHz, plus 850 MHz and 26 GHz in selected areas | n78, n5, mmWave |
| Optus | 3.5 GHz and 2300 MHz, 900 MHz, 26 GHz | n78, n40, n8, mmWave |
| Vodafone (TPG) | 3.6 GHz and 700 MHz | n78, n28 |
The 3.5 GHz band (n78) shared by all three is also the main 5G band in Japan, Europe and much of Asia. If your phone gets 5G at home on n78, it is likely to pick up 5G in Australian cities too. The difference is in low-band 5G that travels further: Telstra uses 850 MHz (n5), Optus 900 MHz (n8) and TPG 700 MHz (n28).
What to check on your phone
- 5G bands: look for "n78" in the spec sheet, then n5, n8 or n28 depending on the operator you will connect to
- 4G Band 28 and VoLTE: Australia has strict device requirements; see the Australia eSIM guide
- Carrier lock: a locked phone cannot use a travel eSIM (how to check if your phone is unlocked)
Speed of Australia's mobile operators: public data stops at the national level
Ookla's Speedtest Global Index gives national figures. In August 2026, Australia's mobile median download was 121.43 Mbps, upload 11.79 Mbps and latency 20 ms, ranking 37th in the world. That is plenty for maps, ride-hailing apps and social video.
For carrier-level speed, we could not find an Australian mobile award on Ookla's public pages. Optus cited a different research firm's awards in its May 2026 results, but that is the company's own announcement. Primary data that settles speed differences between operators is limited for now. For travellers, whether your destination is inside the operator's coverage matters far more than speed.
Telstra launched satellite messaging using Starlink in June 2025, but it is for Telstra postpaid customers, and its Traveller SIM is stated to exclude satellite. It is safer not to expect this feature on a travel eSIM.
Which Australian operator does your travel eSIM use? How to check
Most travel eSIMs connect by renting capacity from an Australian operator, and the operator varies by product. The Coral eSIM Australia plan page lists Optus (5G) as the supported network (as of 26 September 2026). This may differ by plan, so check the field for the plan you buy.
- Before buying: check the supported network field for the operator name and 5G support
- Check your route: if you are heading inland or to national parks, look up your destinations on that operator's official coverage map
- Check your phone: confirm n78 and the operator's low-band 5G band in the spec sheet
- After arrival: on iPhone, go to Settings, Mobile Service (Cellular), your travel line, Network Selection to see the operator you are on. On Android the wording varies, but look for "Network operators" in the SIM settings
- Leave the APN alone: it is usually set automatically when you install the eSIM. Change it only if the instructions say so (eSIM APN settings)
If speeds are poor, see what to do when your eSIM is slow. You can check the supported network on the Coral eSIM Australia plan.
Australia mobile operators: frequently asked questions
Which operator has the widest coverage in Australia?
By official figures, Telstra covers 3 million km² and 99.7% of the population, and says its network covers 900,000 km² more than any other. Vodafone (TPG Telecom) covers around 1.2 million km². We could not find a current Optus area figure on its official site.
Which mobile operator in Australia is the fastest?
We could not find a public, carrier-by-carrier speed measurement on official sites. Nationally, Ookla reports a mobile median download of 121.43 Mbps for August 2026. When travelling, check first that your destination is inside the coverage area.
Are Vodafone and TPG different companies?
In Australia, Vodafone is a brand operated by TPG Telecom. Since January 2025, TPG has shared Optus sites in regional areas. So outside the cities, Vodafone and Optus customers can end up on the same sites.
Can I use Australian 5G with a phone from home?
All three operators run 5G mainly on 3.5 GHz (n78). If n78 is in your phone's spec sheet, the frequency side is covered for city 5G. You also need 4G Band 28 and VoLTE support, so check those too.
How do I check which operator I am connected to?
On iPhone, go to Settings, Mobile Service (Cellular), your travel line, Network Selection. On Android the wording varies; look for "Network operators" in the SIM settings. The Coral eSIM Australia plan page lists Optus (5G) as the supported network.
In Australia, choose your eSIM by whether your route is inside the operator's coverage
Australia's mobile operators are Telstra, Optus and Vodafone. All three offer 4G and 5G in the cities, and 5G runs mainly on n78, the same as in many other countries. Differences appear once you leave the cities: Telstra leads on area, while Optus and Vodafone have shared regional sites since 2025. So with a travel eSIM, first check which operator it connects to on the product page, then check that the regional parts of your route are on that operator's coverage map. For a city-focused trip, the operator is unlikely to make a big difference.
See the plans and supported network for Australia on the Coral eSIM Australia plan, and plans for other countries on the plan list.
