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UPDATE 5/21: T-Mobile has officially launched a Live Translation beta, with support for 80+ languages. Just dial 87 during a call, and whatever is said will be translated in your voice.
During the beta, the service will be free. It taps into T-Mobile’s network infrastructure, so "it all works on virtually any phone that connects to our network, from the newest smartphone to a classic flip phone," says T-Mobile President of Technology and CTO John Saw.
Original Story 2/11/26:
An upcoming live-translation tool from T-Mobile will require no new software or even a phone that can do anything more than connect to that carrier’s 5G network. But it may demand a little more trust in the network and the humans behind it.
That’s because the Live Translation service that T-Mobile announced Wednesday employs an agentic AI platform hosted on its “5G Advanced” network to serve as a real-time interpreter of 50-plus languages. In fewer words: The network is the computer, or in this case the protocol droid.
“When language gets in the way, the network gets reduced to just a signal—and that’s not who we are,” T-Mobile CEO Srini Gopalan said in a statement.
To use Live Translation, one person on a call needs to be on T-Mobile’s 5G network and then press or tap 87 to activate it. That service-code interface preserves compatibility with feature phones; it also doesn’t risk having a voice-driven interface detect a wake word that nobody actually said, a problem that Amazon, Apple, and Google have run into with smart speakers and personal-assistant apps.
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The service requires signing up for a beta test, with registration open Wednesday and “access planned for this spring for selected users,” and general availability set for “later this year.”
T-Mobile isn’t saying if that commercial debut will bring a surcharge or see the service reserved as a perk on some of its more expensive personal or business plans. “We will share more on pricing and plan details closer to commercial launch,” emailed Mason Miller, a T-Mobile spokesperson.
T-Mobile’s press release also doesn’t cover how much data T-Mobile retains from a service that requires its AI to listen to every word on a call. So we asked. “We do not save call recordings or transcripts,” Miller replied. “The service is designed to translate conversations in real time and then move on, without storing the content of those calls.”
This also means T-Mobile won’t keep transcripts to train its AI models, a frequent concern with AI services: “We’re able to measure performance metrics like accuracy and latency during the call itself, so there’s no need to retain conversations after they end.”
Wireless carriers in the US don’t have the greatest records of customer-data stewardship, so T-Mobile customers—and people who regularly call T-Mobile customers—are well within their rights to consider the data trail that a new carrier service might leave.
T-Mobile’s upcoming offering will compete with a host of third-party translation apps, some of which can serve as a real-time interpreter on phone calls. A few of them, such as Apple’s and, to a lesser extent, Google’s, can also do their translation offline using on-device models, which makes them worth keeping on your phone even if you decide to pick up on T-Mobile's new offer.