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by Matthias247
3472 days ago
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I think more than half of the FB users also use the app or facebook messenger, which gives them access to their phone number through app permissons alone. Additionally they have access to the contact lists of both apps and can correlate names and phone numbers from there. Even if someone doesn't use the FB app and hasn't listed his phone number in FB - if any friend has him as contact in FB and Whatsapp it's quite trivial to match the IDs. |
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