T-Mobile claims to have recorded a world record 5G uplink speed during a recent trial that used 5G Radio Dual Connectivity (5G DC).

The carrier said that because of 5G DC it was able to clock a peak speed of 2.2Gbps via its 5G Standalone (5G SA) network.

T-Mobile leveraged 5G DC to aggregate 2.5GHz and mmWave spectrum, which it notes allowed it to boost uplink throughput and capacity.

During the test, the carrier was able to allocate 60 percent of the mmWave radio resources for uplink, where previous use cases typically allowed up to 20 percent.

The trial was carried out over T-Mobile's 5G SA production network at the SoFi Stadium in Southern California.

Ericsson provided equipment and a 5G DC solution, while a mobile test smartphone powered by a flagship Snapdragon X80 5G Modem-RF System was from Qualcomm Technologies, Inc.

“With 5G DC, T-Mobile is pushing the boundaries of what’s possible to create better experiences in the places that matter most to our customers,” said Ulf Ewaldsson, president of technology at T-Mobile.

“This accomplishment is a testament to the network we’ve built over the last five years and our ability to deliver unparalleled capabilities that extend beyond the devices in our pockets.”

The uplink speeds demonstrated by T-Mobile dwarf the 12.19Mbps median upload speeds that T-Mobile hit in June 2024, as reported by Omdia.

"High uplink speeds are essential for delivering immersive experiences and reliable 5G connectivity," added Mårten Lerner, head of product area networks at Ericsson.

"This mirrors one of our key objectives with the recent launch of Ericsson 5G Advanced, which is to elevate user experience by enhancing network performance for more interactive applications."

T-Mobile has the biggest 5G network in the US at present, and launched its 5G SA network in 2020.