Check for sudden battery drain
Check for unusual data usage
Check for overheating when idle
Check for unknown apps installed
Check for apps requesting suspicious permissions
Check for pop-ups or ads outside the browser
Check for random reboots or crashes
Check for slow performance without reason
Check for calls or texts you did not send
Check for login alerts from your accounts
Check for unknown devices signed into your accounts
Check for changes to browser homepage or search engine
Check for forwarded calls, texts, or emails you did not set
Check for disabled security settings
Check for microphone, camera, or location indicators you did not trigger
Check for unfamiliar charges on your phone bill
Check for messages sent to contacts without your knowledge
Check for antivirus or security apps being disabled
Check for unusual account recovery emails or password reset requests
Check for suspicious VPNs, profiles, or device administrators
Check for signs of SIM swap, such as loss of service or inability to make calls