network
Optus says it has achieved a world-first by testing 180MHz carrier aggregation across 2.3GHz and 3.5GHz spectrum on its 5G standalone (SA) network in collaboration with Ericsson, a move the companies say will boost speeds and reliability for customers. The trial combined Optus’ two mid-band time division duplex (TDD) holdings to reach a record 180MHz of aggregated TDD spectrum.
Conducted on Optus’ commercial network at its Sydney campus, the test used mainstream devices, including flagship smartphones such as the Samsung Galaxy S26 Ultra. Optus said the results highlight the practical readiness of large-scale 5G SA four-component carrier (4CC) aggregation across TDD and frequency division duplex (FDD) bands in commercial settings.
According to Optus, the new capability is designed to improve performance for data‑intensive applications including high‑resolution video streaming, augmented and virtual reality, and large downloads.
The company also said that by dynamically combining low‑ and mid‑band spectrum to allocate resources in real time, it can provide more stable connectivity in high‑traffic locations such as central business districts, transport hubs and major events.
Optus added that the 180MHz combination across two TDD bands will enhance its 5G Fixed Wireless Access services, offering faster, more consistent broadband alternatives for households and businesses. Support for the capability is already available on mainstream devices on the Optus network, including the Samsung Galaxy S24 and later series, the company said.
“This achievement demonstrates how we are translating cutting‑edge 5G technology into meaningful benefits for customers in real‑world environments,” said Sri Amirthalingam, Optus’ chief technology officer.
“This milestone marks an important step in our network evolution towards 5G Advanced.” Ludvig Landgren, head of Ericsson Australia and New Zealand, said the milestone underscores the partners’ work in expanding and combining spectrum assets to deliver performance gains that translate into better everyday experiences for users.
The companies said the development builds on their earlier work, including a 2020 demonstration of 2300MHz and 3500MHz 5G Non‑Standalone (NSA) carrier aggregation. Optus plans to progressively roll out the advanced carrier aggregation capability across metropolitan networks in Sydney and Melbourne over the next 12–18 months.