I have a question, what do companies do with your phone number ? can they trace who you are and what you do ?

  • @Turbo@lemmy.ml
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    522 years ago

    One thing I would suspect is they leverage third parties and share your phone number to get back additional known data about you or your interests or other activities which other companies have shared. I think in a way it ends up being a connection point for your data across many places.

    • @demystify@lemmy.ml
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      122 years ago

      How do you combat this sort of thing? Besides periodically changing your phone number, of course

      • Obviously, never enter your real number in a web form unless the service depends on you getting called back … in which case you likely would have called the company by phone anyway.

        • @Sternout@feddit.de
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          102 years ago

          This is not possible.

          Most services that require a phone number also verify it via sms.

          Additionally they check so that each number can only be used once, disabling most free sms receivers online.

          • Oh, i never experienced this. My thought is rather, “nobody will call anyway” … that said, perhaps it’s because i’m largely living outside of online buseness. Location: Europe mostly. What busenesses are you talking about, out of interest?

  • Em Adespoton
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    412 years ago

    They use it as a primary key for linking all your other personal information, use it to geolocate you, use it to sell to marketing lists as a verified number, and use it to cross reference with other sources that leak your phone number.

    It’s the “one ring”.

    • @deo@beehaw.org
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      2 years ago

      One number to track them all,

      One number to find them,

      One number to sell for spam,

      And in the metadata bind them.

  • Nytelock
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    122 years ago

    It’s used to keep you updated on your car’s extended warranty

  • @sirlington@lemmy.world
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    122 years ago

    Many companies sell your data to data brokers, and a phone number can act as a unique identifier across several data sources, allowing brokers to merge several data profiles together into a mega-profile about you.

      • Em Adespoton
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        82 years ago

        In many places companies are already required to do so on request. Which is why data brokers regularly change their names. If you don’t know who they are, you can’t request your data or ask to have it purged.

        • @miss_brainfart@lemmy.ml
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          22 years ago

          Exactly, on request. But what if we forced them to do so automatically, without it having to be requested?

          They’d come up with the most wild and hilarious excuses, wouldn’t they

  • Atemu
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    122 years ago

    One of the more legitimate uses is to have a decent way of identifying humans. Most humans only have a very limited amount of phone numbers (usually exactly one) and even extreme cases can only acquire a rather limited amount of them.

    Contrast that to most other identification methods such as email or online accounts where a singular entity can create limitless amounts of them, that’s quite a lot better.

    Obviously most companies also abuse your phone number for malicious purposes such as tracking, profiling, spam etc.

  • Herding Llamas
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    82 years ago

    Depends on the company. It’s often used innocently to identify that you are a person, and a specific person. Other times it gets tossed into huge data bases. I work in sales and it’s crazy what personal details you can see about people when you use expensive Software.

  • Envis10n
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    72 years ago

    They use it to call you up on the weekends to see if you want to come hang out.

      • Link.wav [he/him]
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        12 years ago

        “I told you I don’t want to hang out with you.”

        “I’m sorry, but I’ll need that rejection mailed to me by post in a hand-signed letter.”