Check for unusual battery drain
Check for sudden overheating
Check for unexpected data usage spikes
Look for frequent app crashes or freezes
Review installed apps for unknown or suspicious apps
Check for apps with excessive permissions
Look for pop-up ads appearing outside the browser
Watch for browser redirects or changed homepage/search engine
Check for unfamiliar charges or SMS messages
Review device administrator apps and accessibility permissions
Scan the device with a reputable mobile antivirus app
Update Android and all apps to the latest versions
Boot into Safe Mode and see if the issue persists
Uninstall recently installed or suspicious apps
Clear browser cache and download history
Reset app preferences if needed
Back up important data and perform a factory reset if problems continue