Telstra has officially introduced Telstra Satellite Messaging (TSM), a breakthrough service designed to keep Australians connected even in the most remote corners of the country. This service, which uses SpaceX’s Starlink Direct-to-Cell technology, enables users to send and receive SMS via satellite without relying on traditional cell towers. At launch, the feature is only available to Telstra users with Samsung Galaxy S25 series devices and suitable tariffs. With the implementation begun, Telstra becomes the first Australian operator to offer satellite-to-phone messaging, strengthening its position as a connectivity innovator.
Why This Matters for Remote and Rural Australia
Geographically, many Australian locations, particularly those in the outback and along the coast, experience limited mobile coverage. Telstra Satellite Messaging bridges this gap, allowing customers to send text messages even when they are distant from the nearest cell tower.
The technology has already been tested in regions like the Northern Territory, Western Australia, Queensland, and New South Wales. During these tests, over 55,000 communications were sent, showing that the technology works even in the most harsh environments.
“Being able to send or receive a text message from an outdoor location that is beyond the range of our mobile network is a significant step forward,” Telstra stated.
How the Technology Works
Telstra Satellite Messaging operates using Starlink’s Direct-to-Cell (D2C) satellite technology, turning the sky into a new kind of mobile coverage zone. Here’s a breakdown of how it functions:
Satellite-as-a-Tower Concept
In place of traditional cell towers, supported smartphones communicate directly with satellites in low Earth orbit. These satellites function as mobile towers in orbit, allowing direct contact between a phone and the satellite network.
Automatic Switching
When a user reaches an area without Telstra mobile coverage, the compatible Samsung Galaxy S25 automatically connects to the Starlink satellite network. There is no need to download apps or change any settings manually. As long as the sky is clear, the phone can send and receive SMS messages via satellite.
Satellite Availability
Starlink has more than 6,300 satellites, but only about 2,000 provide Direct-to-Cell. This limited amount may have an impact on message delivery speeds. In some circumstances, messages may be delivered instantly. Other users may encounter delays of a few minutes, depending on satellite location and sky visibility.
Outdoor-Only Access
As the device requires a clear line of sight to a passing satellite, users must be outside in an open space. Buildings, mountains, and dense forest cover can all interfere with signal reception. Still, for someone lost or exploring in the wilderness, the ability to send even a delayed message can be life-saving.
Current Limitations and Future Plans
At launch, the service only enables SMS messaging; no voice conversations, internet surfing, or direct access to emergency services are currently accessible. Telstra has stated that future updates will provide new functions, including voice capabilities, which are scheduled for 2027.
For the time being, support is limited to the Samsung Galaxy S25 series, but Telstra intends to expand compatibility to include other Android devices and future Apple models.
A Global Trend and Telstra’s Role
Telstra is not alone in investigating satellite-to-phone communication. Similar systems are already being tested by carriers in New Zealand and the United States. In May, TPG Telecom in Australia successfully delivered a text message over Lynk’s satellite network. Meanwhile, Rogers in Canada has yet to provide a similar service, despite reaching an agreement with SpaceX in 2023.
Beyond TSM: More Innovation from Telstra
In addition to TSM, Telstra is investing in future mobile infrastructure. The business, in collaboration with Ericsson, has launched the AIR 3284, the world’s first 5G triple-band FDD Massive MIMO radio. This new technology improves coverage, speed, and network efficiency and is now in use in portions of Brisbane, with Melbourne installations planned soon.
“The AIR 3284 is the first of its kind and delivers the capacity, coverage, and efficiency needed to support Australia’s 5G evolution,” said Ludvig Landgren, Head of Ericsson Australia and New Zealand.
With Telstra Satellite Messaging, the telecom giant is paving the path for a better-connected Australia. Whether you’re hiking in the wilderness, driving across the outback, or living in a distant village, staying in touch is now easy with just a smartphone and the wide sky above. As Telstra continues to develop, this satellite-based solution represents a significant step toward bridging Australia’s digital divide.
