An expert gives the key to why you should turn off your mobile Wi-Fi when you leave the house: “It can intercept traffic”

In a society that is increasingly dependent on Internet connectivity, the security of always being online often takes precedence over precautions or caution in the face of potential risks. Digital threats are multiplying without many users being fully aware of them. Something as simple as using public Wi-Fi networks in coffee shops, airports, or shopping malls has become a common practice for many users, but it is also an easy entry point for cybercriminals. Faced with this reality, cybersecurity experts recommend a simple gesture that is as easy as it is effective: turn off your phone’s Wi-Fi when you leave the house.

Automatic connectivity is risky

One of the main risks identified by Spain’s National Institute of Cybersecurity (Incibe) is that many mobile phones are configured to automatically connect to available Wi-Fi networks. Without first assessing their security. This behavior may seem convenient, but it is also a great opportunity for criminals. By connecting to unsecured or fraudulent networks, the user can expose sensitive information such as passwords, bank details, or even private conversations.

Experts say unencrypted public Wi-Fi networks are one of the most common attack vectors. Anyone with basic knowledge can intercept the traffic circulating on these open networks. Incibe warns that this type of interruption allows attackers to spy on, capture, and even manipulate the data transmitted between the user and online services. One of the most dangerous techniques is the “evil twin”: fake networks that mimic the names of legitimate networks to deceive users. Once connected, the phone is exposed to information theft or malware installation without the user’s knowledge.

Malware, a threat that gives no warning

Moreover, according to the National Cryptologic Center, attacks using this type of malware have increased by 43% in Spain in the last year, reflecting the growing sophistication of the methods used by cyber attackers. Faced with this scenario, experts are clear: one of the most effective measures to reduce the risk of attack is to turn off the Wi-Fi of the mobile phone when it is not being used, especially when away from home.

For those who need to access the Internet on the road, experts recommend using virtual private networks (VPNs), which encrypt connections and provide an extra layer of security. Other key recommendations include keeping operating systems and applications up to date, enabling two-step verification, and avoiding entering sensitive data on open networks.