T-Mobile has been called the best carrier because of a recent cellular report. Though, they want to keep taking their network to the next level. And that’s just what they’re doing, according to President of Technology Neville Ray. He spoke in a keynote at Mobile World Congress in Barcelona yesterday and announced that T-Mobile achieved something epic. They made the world’s first four-carrier aggregation data call on its 5G SA network with a commercial device and reached speeds above 3.3 Gbps.

“We are working with industry leaders around the globe to move the 5G ecosystem forward for the benefit of wireless customers everywhere,” said Neville Ray, President of Technology at T-Mobile. “With the most advanced 5G network in the world, T-Mobile is at the forefront of wireless innovation, spearheading new capabilities so we can continue raising the performance bar and enable future transformative applications that require a seamless and robust 5G connection.”

Four-Carrier Aggregation

Carrier aggregation is a technique used in LTE and 5G networks to increase the data transmission rates and capacity by aggregating multiple frequency bands or carriers into a single logical channel. By combining multiple carriers, the available spectrum can be used more efficiently, enabling higher data speeds and more reliable connectivity.

In their test, the Un-carrier merged four 5G channels of mid-band spectrum – two channels of 2.5 GHz Ultra Capacity 5G and two channels of 1900 MHz spectrum – creating an effective 225 MHz 5G channel. That’s like taking four separate highways and turning them into a massive superhighway where traffic can zoom faster than before. Customers with the Samsung Galaxy S23 will be among the first to experience four-carrier aggregation later this year. More devices will follow.  

VoNR (Voice over New Radio)

With VoNR, T-Mobile is moving voice traffic to 5G so customers stay consistently connected to 5G. In the near-term, customers connected to VoNR may notice slightly faster call set-up times. This means less delay between the time they dial a number and when the phone starts ringing. But VoNR is about more than just a better calling experience. Most importantly, VoNR brings T-Mobile one step closer to truly unleashing its 5G SA network. This is because it enables advanced capabilities like network slicing that rely on a continuous connection to a 5G core. 

Today VoNR is now live in six cities – Cincinnati, OH; New Orleans, LA; New York, NY; Portland, OR; Salt Lake City, UT; and Seattle, WA. The carrier will expand this technology to additional cities covering more than 100 million people in the coming months.