Sudden battery drain
Phone overheating when not in use
Unusual data usage spikes
Apps you did not install
Pop-ups or ads appearing unexpectedly
Phone running slower than normal
Random restarts or crashes
Calls, texts, or emails you did not send
Unknown charges on your phone bill
Settings changed without your permission
Camera or microphone activating unexpectedly
Strange background noise during calls
Security alerts about unknown logins
Passwords no longer working
Account recovery emails you did not request
Browser redirects to unfamiliar sites
Contacts receiving messages from you that you did not send
Unknown devices signed into your accounts
Phone behavior changes after installing a new app
Antivirus or security app disabled without your action