Here are some actions you should do to protect yourself if you are receiving these calls and messages:
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Block and Report
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Strengthen Privacy Settings
- Who Can Call Me? Choose "My Contacts" if you'd prefer only to take calls from contacts saved on your phone.
- Who Can See My Last Seen: To limit who can see your online status, set this option to "My Contacts" or "Nobody".
- Choosing "My Contacts" or "Nobody" will allow you to decide who can see your profile image.
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Enable Two-Step Verification
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Update WhatsApp Regularly