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

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[-] Turbo@lemmy.ml 72 points 10 months 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 13 points 10 months ago

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

[-] DivergentHarmonics@sopuli.xyz 10 points 10 months ago

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 13 points 10 months 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.

[-] DivergentHarmonics@sopuli.xyz 1 points 10 months ago

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?

[-] chayleaf@lemmy.ml 2 points 10 months ago* (last edited 10 months ago)

they're talking about sites like Facebook

[-] Sternout@feddit.de 1 points 10 months ago

I tried random numbers and internet numbers with Openai, Wolt and Revolut.

They were all rejected

[-] VolunTerry@monero.town 1 points 10 months ago

Yep. I've tried using dummy numbers in the past for things where no phone contact is required for contact and it frequently triggers fraud prevention even if not rendered useless by sms verification before submission.

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this post was submitted on 28 Aug 2023
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