It’s not a huge stretch to say that without the domain name system, the internet as we know it would be practically unusable. With domain names being as important as they are, the servers we use to look them up form a critical part of our internet experience. For users who would like a little more control over how their phones resolve domain names, we’re here to talk about what you can do to configure Android to work with the domain name server of your choice….
https://www.androidpolice.com/2018/04/20/make-android-use-dns-server-choice/