Telstra, Optus or Vodafone: Which provider offers the most consistent speeds?

We've looked at a few metrics to determine which network delivers the best results in major metro areas.

Telstra, Optus and Vodafone all invest billions of dollars in their networks each year, improving everything from coverage in rural areas to download speeds and capacity.

However, just because a telco says it's throwing big dollars at the network, doesn't necessarily mean you as a customer are going to see better results in day-to-day usage.

Luckily, there are a few metrics we can look at to help us work out what sort of performance you're likely to achieve and why you're achieving that.

Compare speed results

Unsurprisingly, it's Telstra that takes the lead across all three tests. Its network infrastructure is both the oldest and the largest of all Australian telcos, which gives it an advantage in delivering higher speeds across a wider portion of the country.

That said, Telstra's lead isn't as commanding as it once was. Vodafone and Optus have spent considerable time and money in recent years shoring up their own networks and the test results reflect that. Yes, if you want the fastest speeds possible, Telstra is likely your best choice, but you're not going to be left in the dust if you go with Vodafone or Optus.

Veronica Garcia's headshot

"I used Telstra prepaid during my 1-month visit to Australia, and it consistently delivered excellent coverage from Sydney to the country towns of Victoria. The reliable service allowed me to easily navigate and use the internet everywhere I went."

Veronica Garcia
Finder crew member

One point worth noting is how different the P3 speeds are to the crowd-sourced OpenSignal and Ookla results. The speeds recorded by P3 are far higher than those from Ookla and OpenSignal, which is largely due to the controlled nature of the P3 tests.

For its 2018 report, P3 conducted all its tests with Samsung Galaxy S8 handsets. The Galaxy S8 supports Category 16 network speeds and can take advantage of a technique called "carrier aggregation" (also referred to as LTE-A or LTE Advanced) where it receives data across three different frequencies at the same time. This allows for far higher speeds than are possible across a single frequency.

In reality, a lot of Aussie phones don't support carrier aggregation and this is likely why the OpenSignal and Ookla results are considerably lower than P3's.


As data limits continue to rise, handling congestion and consistent network speeds will become a challenge for carriers as they start to roll out their 5G networks.

For now though, it's important when you're signing up to a new plan to seek results like these to show what the network you're signing up to is like. There's no point buying a 50GB plan if you can barely use it because of sub-par speeds.

It's also wise to consider signing up to a month-to-month plan, either SIM-only or on a prepaid basis.

A lot can change in a network in just a couple of years, so not locking yourself into a service that could be dramatically different halfway through your contract is wise. That's if you don't need a new handset to go with your service, of course.

Also remember it's incredibly easy to change carriers if yours isn't fast enough, as is keeping your own number when you move, which in most cases is transferred within the hour of signing up.

Compare plans from the big 3 providers below

Name Product AUFMP-SIM Price Features Data Price
Optus Flex Plus $35
https://dvh1deh6tagwk.cloudfront.net/niche-builder/606e623bb9efc.png
Black Friday: $12 1st 28 days, ends 4.12.24 + 55GB on 1st 3 recharges, activate by 7.3.25 + Unlimited data weekends with AutoRecharge, ends 16.3.25. T&Cs apply
  • Unlimited standard national calls & texts
55 GB
Data
$35
per 28 days expiry
55 GB
Data

$35
per 28 days expiry
Go to site
View details
Optus Flex Plus $160 186 days
https://dvh1deh6tagwk.cloudfront.net/niche-builder/606e623bb9efc.png
130GB for the first 3 recharges within 3 years of activation, then 80GB/recharge. Speed caps and T&Cs apply.
  • Unlimited standard national calls & texts
130 GB
Data
$160
per 186 days expiry
130 GB
Data

$160
per 186 days expiry
Go to site
View details
Optus Flex Plus $12
https://dvh1deh6tagwk.cloudfront.net/niche-builder/606e623bb9efc.png
5GB on first 3 recharges, then 3GB/recharge. T&Cs apply.
  • Unlimited standard national calls & texts
5 GB
Data
$12
per 7 days expiry
5 GB
Data

$12
per 7 days expiry
Go to site
View details
Optus Plus Promo Plan $79
https://dvh1deh6tagwk.cloudfront.net/niche-builder/606e623bb9efc.png
$69/mth for the first 12 months, then $79/mth. Plus, get up to $10/mth SubHub credit for 12 months. Eligibility criteria, T&Cs apply. Ends 2.12.24
  • Unlimited standard national calls & texts
360 GB
Data
$69
per month
360 GB
Data

$69
per month
Go to site
View details
Optus Flex Plus $55
https://dvh1deh6tagwk.cloudfront.net/niche-builder/606e623bb9efc.png
100GB on 1st 3 recharges then 40GB (new services activated by 7.3.25) + Unlimited data every weekend until 16.3.25 with AutoRecharge. Fair Go Policy, T&Cs apply
  • Unlimited standard national calls & texts
100 GB
Data
$55
per 28 days expiry
100 GB
Data

$55
per 28 days expiry
Go to site
View details
Optus Flex Plus $320 365 days
https://dvh1deh6tagwk.cloudfront.net/niche-builder/606e623bb9efc.png
Black Friday: $220 1st recharge, then $320, ends 4.12.24. 280GB for 1st 3 recharges within 3 years of activation, then 200GB/recharge. Speed caps, T&Cs apply.
  • Unlimited standard national calls & texts
280 GB
Data
$220
per 365 days expiry
280 GB
Data

$220
per 365 days expiry
Go to site
View details
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Compare services

TelstraOptusVodafone
4G coverageCovers 1,600 Australian towns and communitiesCovers 98.5% of the Australian populationCovers over 22 million Australians
5G launch2019Early 20192020
Mobile appYesYesYes
Customer/chat support24x724x7Yes
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Image: Shutterstock

Matt Sayer's headshot
Written by

Writer

Matt Sayer is a technology writer and editorial engineer for Finder, combining industry expertise with data-driven solutions to help people make better decisions. His extensive portfolio spans investigative reporting on the roll-out of 5G, statistical analysis on the legacy of E3 and guides for popular products like mobile phones and smart speakers. Matt has a Bachelor of Computer Science from RMIT University and is passionate about finding ways that technology can better our lives. See full bio

Mariam Gabaji's headshot
Co-written by

Editor I Tech and utilities expert

Mariam Gabaji is an editor and tech and utilities expert at Finder with 12+ years of experience as a journalist. She's committed to helping households cut through the industry jargon and save money on their bills. Her expertise is often featured in media including the ABC, Yahoo Finance, 9News, 7News, A Current Affair, The Guardian, SBS and Money Magazine. See full bio

Mariam's expertise
Mariam has written 298 Finder guides across topics including:
  • Energy
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  • Broadband
  • Consumer tech

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