DNS leaks- problem when using free Wi-fi

According to Kaspersky lab

70% of tablet owners and 53% of smartphone / mobile phone owners stated that they use public Wi-Fi hotspots. However, because data sent through public Wi-Fi can easily be intercepted, many mobile device and laptop users are risking the security of their personal information, digital identity, and money. Furthermore, if their device or computer is not protected by an effective security and anti-malware product… the risks are even greater

Solution....VPN

using a VPN when you connect to a public Wi-Fi network, you’ll effectively be using a ‘private tunnel’ that encrypts all of your data that passes through the network. This can help to prevent cybercriminals – that are lurking on the network – from intercepting your data. Under certain conditions, even when connected to the anonymity network, the operating system will continue to use its default DNS servers instead of the anonymous DNS servers assigned to your computer by the anonymity network. DNS leaks are a major privacy threat since the anonymity network may be providing a false sense of security while private data is leaking.