The world’s fastest LTE-A speeds are now available in Australia, with Telstra dubbing its service 4GX, in a naming differentiation much like Telstra’s faster that competitors’ 3G service dubbed “Next G” was (and still is!) at the time.

NOTE: Video of the launch speeches will appear in a separate story later today. 

The 800-trillion-kilo ‘telcorilla’ says the service, delivered over its new 700MHz spectrum, delivers ‘higher typical mobile speeds on compatible devices’ for ‘more reliable connections and ultra-fast mobile internet’.

Compatible devices can also use Telstra’s 1800MHz and 700Mhz spectrum bands together to provide even faster 4G speeds - carrier aggregation - although this is rated "up to 300Mbps", you'll likely get up to 200Mbps, which is still pretty damn fast. 

Parts of Sydney, Adelaide, Perth, Darwin and 10 regional centres with 4GX services already switched on were joined with parts of Hobart and Brisbane today.

Telstra’s Director of Devices, the smoothly Kojak-looking Andrew Volard, naturally talked up the 4GX name and said: “As humans we love technology that allows us to go faster and connect in the moment. 4GX sets a new benchmark in mobile internet speeds in Australia allowing people to download, share, stream and connect faster and more reliably than ever.”

“Customers using devices such as the upcoming Samsung Galaxy Note 4 and Telstra Wi-Fi 4G Advanced II in 4GX areas are set to enjoy top speeds twice as fast as those available on our existing 4G.”

“4GX also allows our customers to experience 4G in more places, with the low band spectrum offering extra in-building coverage and creating better 4G coverage in rural and regional areas than our existing 4G.”

4GX customers with Cat 6 devices will be able to enjoy speeds of between 2Mbps and 100Mbps, with the image below showing over 122Mbps on the network albeit with few people as yet using it, especially given the Samsung Galaxy Note 4 isn’t officially launching on Telstra until Wednesday this week. Upload speeds reached 17Mbps in testing here at the launch, with Andrew Volard stating the real advance of LTE-A/4GX was download speeds. 

Another image at the end of this article shows Galaxy Note 4 hitting over 155Mbps speeds! 

4GX customers with Cat 4 devices will get download speed of between 2Mbps and 75Mbps.

Given the 700MHz capability of 4GX/LTE-A, people with a compatible device will get even better in-building coverage than the 850MHz 3G/Next-G service provided.

For rural and regional customers in range of 4GX-equpped towers, 4GX promises to “go further” than existing 4G-only services, which will create “better 4G coverage”.

4GX will also “double Telstra’s 4G bandwidth allowing people to enjoy their favourite content with fewer slowdowns even in peak hour or in crowded places like shops or on the bus.”

In addition, 4GX will be extended to all capital CBDs with 3 kilometres of the GPO, and 50 regional centres by January 2015 - a very fast timeframe showing how long Telstra has been planning this rollout, which is 90% of Australia's population by the end of January 2015. 

4GX will also naturally be expanded across Telstra’s footprint “over time”, which probably means throughout 2015.

Telstra says the 4GX brand name will progressively appear “in stores and in local advertising” as it is rolled out in various areas.

The 4GX tag will be used online and in store for compatible devices.

Telstra says all the top smartphones, tablets and mobile broadband devices available now or very shortly, including the Galaxy S5, Note 4, iPhone 6, 6 Plus and iPad Air 2 are 4GX ready.

More information is available at Telstra’s 4GX site.