FixablePlatforms & social life
Contact uploading
One friend installing an app can hand over your number and details.
Understand it
Many apps ask to “find your friends” by uploading their whole address book. You don’t have to use the app at all - if someone who has your number does, your name, number and relationships can end up in that company’s hands, and in the shadow profiles they build on people who never signed up.
How to spot it
You can’t see this happening - it’s done by other people’s phones, not yours.
Close the gap
- Decline “find friends” / contact-upload prompts in the apps you do use.
- Keep a separate number or email alias for sign-ups and sharing.
- Ask close contacts not to sync their address book to apps you avoid.
- Use the platform’s privacy settings to limit being found by phone or email.
What to do about it
This is part of your plan at the High-risk level - Harden your devices. Work through it there and you’ll close this off along with everything else it covers.