Turn on airplane mode
Disconnect from Wi-Fi and Bluetooth
Restart the phone in safe mode
Uninstall suspicious or unknown apps
Remove recently installed apps you do not trust
Clear browser data and cache
Delete suspicious downloads and files
Check app permissions and remove unnecessary access
Update the phone’s operating system
Update all installed apps
Run a trusted mobile security scan
Change passwords for important accounts
Enable two-factor authentication
Back up important data
Factory reset the phone if problems continue
Restore only trusted data after resetting