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CASE #0017 · OPENED 2 NOV · UPDATED 3 DAYS AGO

Do smartphones secretly listen to you for ads? What our sources can and can't show

The material we reviewed documents voice-listening TVs and smart speakers, but offers no evidence that phones covertly record conversations for ad targeting.

Evidence board

  • VerifiedVoice-enabled consumer devices use microphones to listen for commands and send the captured audio to company servers or third parties.4 / 7 sources

    The BBC reported Samsung's own privacy policy saying that spoken words, including personal information, can be captured and sent to a third party. Samsung later confirmed that the third party was Nuance. TechCrunch described the Amazon Echo as always on and processing voice in the cloud. These are TVs and speakers, not phones.

  • DisputedThe listening is secret: users are not told that it happens.4 / 7 sources

    Samsung's listening was disclosed in its privacy policy, and the company says a microphone icon appears when voice activation is on. Even so, privacy campaigners called the wording Orwellian, and the EFF's lawyer said customers should know who the third party is. Amazon says Alexa only records after the wake word. The sources show disclosure, but also unease about how clear it was.

  • UnsupportedSmartphones in particular covertly record ambient conversations through the microphone.2 / 7 sources

    None of the supplied articles tests this. The sources cover smart TVs and Amazon speakers. The only phone-related items are the Alexa app listing, which describes hands-free wake-word use while the app is on screen, and a passing note that the Alexa software also runs on phones. Neither shows covert recording.

  • UnsupportedAudio captured by these devices is used to target advertising at the user.3 / 7 sources

    Samsung told the BBC it does not retain voice data or sell the audio. Amazon's stated reason for keeping clips is to improve machine learning (per Portuguese Wikipedia). No supplied source shows audio feeding ad targeting. A 2019 study summarized on Wikipedia found that streaming devices send data such as screen images to advertisers, but that concerns viewing data, not audio.

  • UnclearConnected devices can be hacked or compromised to turn on the microphone and eavesdrop.1 / 7 sources

    Wikipedia's Smart TV article says there are concerns and some documented vulnerabilities, including access to the camera and microphone, and mentions CIA Vault 7 documents about compromising smart TVs. The material we were given does not include the primary reports, and it covers TVs, not phones. This is also a different claim from advertisers listening.

Analysis

The idea that your phone is quietly recording your talk so advertisers can follow up with matching ads is among the most common tech suspicions. The sources we gathered do not test it directly. They are about smart TVs and Amazon's Alexa speakers, and they show what is known about voice-listening devices in general. They give no evidence for covert, ad-driven eavesdropping by smartphones.

What's being claimed

The circulating claim has several parts. First, that smartphone microphones capture conversations without the owner's knowledge. Second, that this happens continuously and in secret. Third, that the audio is then used to target ads. Related claims often attached to it are that devices can be hacked into listening devices, and that companies keep recordings.

What the evidence shows

The supplied material establishes one narrower point: voice-enabled devices do listen, and sometimes the audio leaves the device. In 2015 the BBC reported on Samsung's smart-TV privacy policy, which warned that spoken words, including personal information, could be captured and passed to a third party. Samsung said this happens only when a user triggers voice search with the remote. It said it does not retain or sell the audio, and that a screen icon shows when voice activation is on. It confirmed that the speech-to-text third party was Nuance.

Amazon's Echo works on a similar principle. TechCrunch described a device that is always on, with seven microphones, that processes voice in the cloud, and noted that Amazon says it listens only after the activation word. Portuguese Wikipedia's Alexa entry says Amazon staff, including contractors, listen to short clips to improve machine learning, which the company confirms. It also says Amazon states that Alexa records only after the wake word. Wikipedia is a starting point here, not proof, and the primary reports behind these statements were not among our documents.

Nothing in these sources shows audio being used to target advertising. Samsung's denial of selling audio is a company statement, not an independent audit. Wikipedia's Smart TV article does cite a 2019 Princeton and University of Chicago study finding that streaming devices covertly send data, including screen images, to advertising and analytics firms. That is evidence of ad-related tracking, but of viewing behavior, not of microphone audio. The same article says smart TVs have had security flaws and mentions concerns about remote microphone access, but it describes TVs, not phones.

The only phone-related material is the Alexa app listing, which describes hands-free use by saying "Alexa" while the app is open. It also lists categories of data the app may collect, such as location and search history. The listing is a developer's own disclosure and does not mention audio being used for ads.

How outlets covered it

The BBC reported the Samsung story neutrally, giving space to both the EFF's "Orwellian" comparison and Samsung's explanation. TechCrunch presented the Echo as a product launch and noted that always-listening may make users uneasy, while relaying Amazon's wake-word assurance. O Globo and Tecnoblog covered the Echo launch in Portuguese in similar product-news terms, and Tecnoblog noted the lack of an off switch. Wikipedia entries summarize the controversies but cite mostly product coverage. None of the supplied outlets examines smartphone eavesdropping for ads.

What we still don't know

Our sources cannot say whether any phone app or operating system has been shown to record ambient speech for ad targeting, or what technical analyses of phone traffic have found. They also can't say whether apparent matches between a conversation and later ads can be explained by other tracking, such as the viewing and browsing data described in the 2019 study. A fair reading is that the claim remains unverified by this material. It does not show the claim is false, and it does not show it is true. Anyone wanting a firm answer needs independent technical audits and primary company disclosures, which we did not have here.

Sources

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