With an average download speed of 37.4Mbps, Australia was behind South Korea (52.4Mbps), Norway (48.2Mbps), Canada (42.5Mbps), the Netherlands (42.4Mbps) and Singapore (39.3Mbps).
China was missing from the countries where speeds were measured while India had only 6.8Mbps to show.
New Zealand had an average download speed of 27.3Mbps while the US was much further down the ranks at 21.3Mbps, below the UK (21.7Mbps).
"We've found that 4G is becoming more and more ubiquitous, even in developing markets," the company said. "Our analysis shows that the average 4G availability across the 87 countries experienced by our users is close to 80%, with 15 markets scoring over the 90% mark.
"The top ends of our tables were largely dominated by European countries, but no one country appeared in the top 10 for all five of our key metrics. European countries, however, dominated, racking up far more top 10 entries than any other region."
When it came to upload speeds, Denmark and South Korea were the top two countries. Australia was 22nd No detailed table of these speeds was released by Opensignal.
As far as latency goes, only 13 countries came in under 40 milliseconds, with Singapore coming closest to the 30ms barrier at 30.7ms.
Opensignal said one of the core metrics to define mobile user experience was the availability of 4G. "Comparing this metric across 87 countries, we saw only four European countries in our top 10 — the fewest
of any of our award categories," the company said. South Korea topped with 97.5, followed by Japan (96.3), Norway (95.5), Hong Kong (94.1) and the US (93.0).
Surprisingly, India was also in the top 10 for 4G availability, with a score of 90.9, ahead of Australia which had a score of 90.3.
"In all of our other mobile network experience measures, we saw at least half of the top 10 ranked countries from Europe. However, neither Switzerland nor Singapore featured in the top-ranked countries for 4G availability, despite both appearing in the top 10s for all our other mobile network experience metrics.
"And users in Japan scored second place for 4G availability, despite barely appearing in the top countries for our other four categories. At the other end of the table, we only saw five countries with 4G availability scores under 60%, while Uzbekistan was the only market to see users spending less than 50% of the time on 4G."
Opensignal said it collected more than three billion individual measurements every day from tens of millions of smartphones worldwide to work out its statistics.
Charts: courtesy Opensignal