Unknown devices appear in WhatsApp Linked Devices
Messages are sent that you did not write
Chats are marked read or archived without your action
Your profile photo, name, or about section changes unexpectedly
Contacts report receiving strange messages from you
You are logged out of WhatsApp without reason
You receive verification codes you did not request
Two-step verification settings change without your knowledge
New chats, groups, or calls appear in your activity that you did not make
WhatsApp shows unusual security alerts or login notifications
Your phone battery, data usage, or app activity spikes unexpectedly
Your account is used on another phone or web session you do not recognize