T-Mobile has started rolling out faster 5G speeds in the US, and the Galaxy S23 is currently the only phone that can take advantage of the faster network. The nationwide mobile network carrier announced that it improved the speed of its 5G network using the CA (Carrier Aggregation).
On its 5G SA (Standalone) network, T-Mobile has started using four-carrier aggregation to improve download speeds. The company is simultaneously using four sub-6GHz 5G bands—two channels in the 2.5GHz spectrum, one 1900MHz channel, and one 600MHz channel—to achieve download speeds of up to 3.3Gbps and lower latency. These speeds were tested on the Galaxy S23, which uses Qualcomm's Snapdragon 8 Gen 2 For Galaxy processor featuring the Snapdragon X70 5G modem.
T-Mobile has been testing carrier aggregation on its 5G network since last year and achieved over 3Gbps real-world download speeds. These speeds are faster than what's currently available on mmWave 5G networks from AT&T and Verizon in the US. The rollout is already public in some parts of T-Mobile's network, and the carrier claims it will expand the coverage throughout the US in the coming weeks.
AT&T and Verizon are also testing a similar technology for faster download and upload speeds. Verizon achieved breakthrough download speeds of up to 4.3Gbps in its 5G carrier aggregation tests, but it is yet to roll out the upgraded network to the public.