Unexpected battery drain
Phone overheating when not in use
Sudden spikes in data usage
Apps you did not install
Frequent pop-ups or redirects
Strange messages sent from your account
Unknown devices signed into your Apple ID
Passwords no longer working
Microphone or camera activity without reason
Settings changed without your permission
Calls, texts, or emails you did not send
Browser homepage or search engine changed
Security alerts about unknown logins
iPhone running unusually slow
Random restarts or crashes
Missing files, photos, or contacts