Check for unusual battery drain
Check for unexpected data usage spikes
Look for random overheating when idle
Watch for strange background noise during calls
Notice delayed shutdowns or restarts
Check for unknown apps or profiles installed
Review app permissions for suspicious access
Look for pop-ups, redirects, or browser changes
Check if texts are sent or received without your action
Notice if the phone lights up or activates on its own
Review call forwarding settings
Check voicemail for unfamiliar access
Look for unfamiliar devices linked to your accounts
Run a reputable mobile security scan
Update the operating system and apps
Reset network settings if needed
Back up important data
Perform a factory reset if signs persist
Contact your carrier for account and call-detail review
Replace the SIM card if you suspect SIM compromise
Change passwords for key accounts from a safe device