Connect to DNS on both Mobile Data Network and WiFi: Speed Test, IPv4, IPv6 DNS Changer is the easiest way to change your DNS and test the speed of DNS servers. It does not require root and works for both WiFi and Mobile Data. DNS Changer changes your device's DNS address and does not affect your connection speed in any way. Therefore, it is faster than a regular VPN. Install DNS Changer for Android and try it for yourself!