Check for unusual battery drain
Check for unexpected data usage
Look for unknown apps installed
Review app permissions
Check for pop-ups or ads appearing randomly
Notice overheating when not in use
Watch for slow performance or frequent crashes
Check for strange calls, texts, or emails sent from your device
Review account logins from unknown locations
Check for disabled security settings
Look for changes in browser homepage or search engine
Scan the phone with a trusted mobile security app
Update the operating system and apps
Remove suspicious apps
Change passwords for important accounts
Enable two-factor authentication
Factory reset the phone if needed