The Finnish networks firm and the US arm of Deutsche Telekom said the tests realised “industry leading connection speeds” and throughput rates of several gigabits per second, although exact numbers were not shared.
The test also saw real-time latency of just 1.8 milliseconds when streaming four simultaneous 4K videos across the 5G interface lab test.
Ricky Corker, executive vice president and head of North America for Nokia, said: "5G is quickly shifting into another gear. We're excited to be working alongside T-Mobile to help drive their 5G plans and show what the future of mobile communications can be for T-Mobile's Un-carrier customers."
T-Mobile recently announced it had hit speeds of 12Gbps in lab tests carried out using 28GHz spectrum with Nokia’s rival Ericsson
Other notable results of T-Mobile’s 5G testing include 8×8 MIMO and four simultaneous 4K video streams.
Neville Ray, chief technology officer, T-Mobile, said: "We've now brought 5G out of the lab and into the field. With Nokia's partnership, we're seeing the kind of astounding data speeds and low latency that are hallmarks of 5G and set the standard for future network performance."