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Communications

T-Mobile is Bringing Low-Latency Tech To 5G For the First Time (theverge.com) 14

T-Mobile is expanding support for the L4S standard across its 5G Advanced network over the next few weeks, becoming the first wireless carrier in the United States to implement the Low Latency, Low Loss, Scalable Throughput technology. The standard helps high-priority internet packets move with fewer delays to make video calls and cloud games feel smoother by allowing devices to manage congestion and reduce buffering issues that can occur even on higher bandwidth connections.

L4S is already deployed in many cities, the company said. Users will not need special phones or plans to access the network-driven improvements.

T-Mobile is Bringing Low-Latency Tech To 5G For the First Time

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  • by PPH ( 736903 ) on Monday July 21, 2025 @11:24AM (#65534622)

    ... better service area coverage instead?

    • by cusco ( 717999 )

      Can literally see their headquarters from my living room window, and only get 3 bars.

  • I have one of their 5g gateways hanging off the backup port on my edge firewall, it runs healthcheck pings, my primary isp hovers around 4ms rtt, my tmobile 5g backup link the lowest I've seen it on the histogram is ~30ms rtt. Although after about 2 months having it in place, half the time it's just showing down but a green status from the account page and from the device itself. I think they're charging me like $10-15/mo for it as a 'backup' class service and I'm about to just turn it off and return it. No

    • Can't you get something that will take PoE and put out Type C power?

      • by Junta ( 36770 )

        If it needs USB-PD, looks like the products are pretty pricey.

        If it can take the old fashioned USB power, looks like a splitter is reasonably available for like $15.

    • Just tried it with my OpenWRT router which has Comcast and T-Mo (the latter their Home Internet Backup plan), and for both Internet connections I'm getting a (mode) time of approx 14.5ms to ping 8.8.8.8 and 1.1.1.1. (This is pinging directly from a root ssh on the router using -I to select the outgoing interface address.) T-Mo was maybe half a ms slower for 1.1.1.1 but all tests were about 14.5ms.

      I assume my Comcast is slower than your connection for some hardware difference (maybe my modem doesn't suppose

      • by Psyko ( 69453 )

        It's hanging wired off of a unifi [ui.com] cloud gateway ultra on the backup wan port. It's down again now.
        I'll have to physically power cycle it again if I get ambitious enough to play with it.

        Signal strength was always reporting good, I'm about 3-400 meters to their 5g can on a pole that covers my subdivision.
        Latency's always been high on it since I first put it in and after it started loosing connectivity I just kind of downgraded the whole thing to "I should just bring this thing back to them". It might just be

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