Be cautious about what apps you install. Only install apps from trusted sources, such as the Google Play Store or the App Store. Avoid installing apps from third-party websites or app stores, as these may be less secure.
Keep your phone’s operating system (OS) up to date, even if you’re not getting security updates from the manufacturer. You can do this by installing custom ROMs.
Custom ROMs are unofficial versions of the Android OS that are developed and maintained by third-party developers. They often include the latest security updates and features, even for older devices.
Use a mobile security app. A mobile security app can help to protect your phone from malware and other threats. It can also scan your apps and files for vulnerabilities and suggest fixes.
Be careful about what Wi-Fi networks you connect to. Avoid connecting to public Wi-Fi networks, as these can be insecure. If you must connect to a public Wi-Fi network, use a VPN to encrypt your traffic.
Back up your phone regularly. This way, if your phone is lost, stolen, or compromised, you can restore your data from a backup.