Check for unknown apps in Settings > Apps
Review app permissions in Settings > Privacy > Permission Manager
Check device admin apps in Settings > Security > Device admin apps
Look for unknown accessibility services in Settings > Accessibility
Review VPN settings in Settings > Network & Internet > VPN
Check for unknown profiles or management in Settings > Security > Device management
Review battery usage for unusual apps in Settings > Battery
Check data usage for suspicious apps in Settings > Network & Internet > Data usage
Review notification access in Settings > Notifications > Notification access
Check account activity in Settings > Accounts
Review installed certificates in Settings > Security > Encryption & credentials
Check for call forwarding settings in Phone app settings
Review app install sources in Settings > Security > Install unknown apps
Look for unusual storage usage in Settings > Storage
Check system updates in Settings > System > Software update
Review Google Play Protect in the Play Store settings
Check for unknown Bluetooth connections in Settings > Bluetooth
Review location access in Settings > Privacy > Location
Check for unexpected screen overlay permissions in Settings > Apps > Special access
Look for device owner or work profile settings in Settings > Accounts or Settings > Security
Run a security scan from Settings > Security or your phone’s built-in security app