Unexpected pop-ups or browser redirects
Apps crashing frequently or behaving strangely
Battery draining much faster than usual
iPhone running hotter than normal
Unusual data usage spikes
Unknown apps appearing on the device
Safari opening unfamiliar websites by itself
Contacts receiving spam messages from you
Calendar events you did not create
Settings changing without your input
Phone lagging or freezing more than usual
Persistent ads outside of normal apps
Apple ID alerts about unfamiliar sign-ins
Device storage filling up unexpectedly
Microphone, camera, or location activity you did not trigger