Comment on How Facebook Knows When Its Ads Influence Your Offline PurchasesparentComments−marco111yMany other apps hash phone numbers to "suggest" security and privacy as well, e.g. Secret. Other apps don't even bother to create the hashes and send the plain text phone numbers, e.g. WhatsApp.
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Many other apps hash phone numbers to "suggest" security and privacy as well, e.g. Secret. Other apps don't even bother to create the hashes and send the plain text phone numbers, e.g. WhatsApp.