Turn on Airplane Mode
Disconnect from Wi-Fi and Bluetooth
Close suspicious apps
Restart the phone in Safe Mode
Uninstall recently installed suspicious apps
Remove unknown device administrator or accessibility permissions
Clear browser data and download history
Update the phone’s operating system
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