Turn on airplane mode
Disconnect from Wi-Fi and Bluetooth
Restart the phone in safe mode
Uninstall suspicious or recently installed apps
Remove apps with device admin access if needed
Clear browser data and download history
Delete suspicious files, APKs, and unknown downloads
Update the phone’s operating system
Update all installed apps
Run a trusted mobile security scan
Change passwords for important accounts from a different device
Enable two-factor authentication
Back up important data
Factory reset the phone if the problem remains
Restore only essential data after resetting
Contact your phone manufacturer or carrier if needed