T-Mobile recently announced a cellular speed test where the company was able to achieve an upload speed of 550 Mbps on a live cellular link. The test was clearly done in ideal conditions in order to achieve the fast speed, but T-Mobile acknowledges that upload speeds are increasingly important to customers. Fierce Network quoted T-Mobile President of Technology Ulf Ewaldsson as saying, “uplink is the next big thing.”

This is something the broadband industry has known for many years. Fiber companies set a standard of symmetrical download and upload speeds, which frankly provide more upload speed than people need. But the public complained loudly about the slow upload speeds from cable companies during the pandemic, and cable companies have scrambled to increase upload speeds using mid-split upgrades. Cable companies have upgraded many markets to upload speeds of 100 to 200 Mbps.

This new speed test record seems to have been released to complement T-Mobile’s press release in April, where it announced that it now offers the first nationwide 5G Advanced network. By that, T-Mobile means its 5G network has begun to incorporate the latest industry 5G standards included in 3 GPP Release 17 and 18. According to the press release, T-Mobile has implemented 5G Advanced nationwide, although there is some discussion in the Fierce Network article saying that is not likely.

There is no doubt that T-Mobile has upgraded networks to a greater degree than the competition, as documented in the latest report from Ookla for the end of 2024 where T-Mobile had a median download speed of 281.5 Mbps, compared to 199.1 Mbps for Verizon and 140.1 for AT&T.  However, during that same period, T-Mobile’s median upload speed, as measured by Ookla, was much slower at 21.3 Mbps. In the April press release, T-Mobile said its typical upload speeds are between 6 and 31 Mbps.

Upload speeds likely matter a lot more to T-Mobile now that it has passed the 6 million customer mark with its FWA home broadband product. Folks who use broadband for gaming, working from home, online schooling, and conferencing are not going to be enamored with a broadband product where poor upload speeds can degrade performance. The current median speed of 21 Mbps is basically the same as the speed customers don’t like on cable company networks.

Upload speeds are probably the biggest long-term weakness of FWA broadband. FWA customers who live in rural areas might not have another alternative other than Starlink, which also has slow upload speeds. But a lot of FWA’s growth is coming from suburbs and cities where customers have a broadband alternative. Cable companies are scrambling to get much faster upload speeds, and fiber generally has symmetrical speeds. Ookla points out in its latest quarterly report that upload usage is growing at a much faster pace than download usage. T-Mobile is being smart in looking at a way to improve upload speeds.