Check for sudden battery drain
Check for unusual data usage
Check for overheating when idle
Check for random pop-ups or ads
Check for unknown apps installed
Check for apps requesting strange permissions
Check for unfamiliar logins on your accounts
Check for calls or texts you did not send
Check for settings changed without your action
Check for microphone or camera indicators turning on unexpectedly
Check for phone slowing down or crashing often
Check for browser redirects or homepage changes
Check for unknown device admin apps or profiles
Check for security alerts from Google, Apple, or your carrier
Check for forwarding settings on calls, texts, or email
Check for suspicious SMS links or messages sent from your number
Check for high background activity in battery or data settings
Check for unusual charges on your phone bill
Check for antivirus or security scans reporting threats
Check for rooted or jailbroken status if you did not do it
Check for factory reset protection or account recovery changes
Check for unknown Bluetooth or Wi-Fi connections
Check for app installs from outside official stores
Check for strange behavior after opening a specific link or file
Check for recent password changes you did not make
Check for login alerts from unknown locations or devices