Here’s some suggestions that can help to secure your phone from viruses and malware:

1. Regularly update your device's operating system, as the manufacturer may have installed a security patch.
2. Download and install a reputable antivirus software on your device and keep it updated.
3. Set a secure device lock, like a PIN (personal identification number) or a password.
4. Don't download an app from any unofficial or unknown sources.
5. Don't click on any strange links in emails or SMS messages.
6. Pay attention to the permissions asked when installing an app.
7. Review the security settings for each app and service you use.
8. Keep your Wi-Fi connections secure.