Activated Wi-Fi function on the mobile phone is a major security risk, experts say. Data on the phone, such as passwords, names, and email addresses, is not secure and can be spied on by hackers.

The energy of the battery is consumed much faster if the phone is constantly searching for existing networks. With deactivated WLAN on the smartphone, you can also save electricity. However, various updates for the iPhone or Android devices aim to increase security.. Leaving the WLAN function on your mobile phone on at all times is dangerous.