Which are the best practices to avoid security threats on a device

The best practices to avoid security threats are mentioned below.

Update your software- Only few people update the operating system and other software, such software are a potential gateways for hackers.  Always install antivirus software on computer and mobile. It should be from a trusted provider. Install a firewall on your smartphone, most of the smartphones do no come with firewall. Firewalls provides stronger protection against digital threats. They also protect the online privacy.Use pass codes on the phone. It protects your information in case of loss or theft of mobile device.  Always download applications from official application stores. Apple stores and Google play always verify the apps while third party app stores don't.

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Show some of the scenarios and ill