Unexpected messages sent from your account
Messages marked as read that you did not open
New devices linked in WhatsApp Web or Linked Devices
Logged out of your account without reason
Contacts report receiving strange messages from you
Profile photo, name, or about section changed without your permission
Security code changes for chats you did not expect
Calls or messages you do not recognize in your chat history
Verification code SMS or call requests you did not initiate
WhatsApp asks you to verify your number repeatedly
Your phone battery drains unusually fast
Your phone gets unusually hot while idle
Unusual data usage from WhatsApp
Unknown apps installed on your phone
Your phone behaves strangely after installing a suspicious app
You lose access to your account suddenly
Two-step verification PIN no longer works
Linked devices you do not recognize appear in your account